Jan 11

Fire Rated Construction Details

Note: Prior to any firewalls being constructed it is essential that the builder consults with the project certifier to ensure that the certifier is aware of the firewall construction procedures and the certifier deems the installer competent.

Fire Resistance Level (FRL) is assessed by three performance measures:-

Structural Adequacy / Integrity /Insulation eg 90/90/90

FRL – 90 Mins. & External Fire Source

CSIRO Full-Scale Fire Test FS 3685/2695 has proven that the QT EcoSeries Wall System (shown right) is capable of achieving a fire resistance of 113 minutes Integrity and 115 minutes Insulation when tested in accordance with AS1530.4. Therefore for the purpose of Building Regulations in Australia, the QT EcoSeries Wall System achieved a fire resistance level (FRL) of 90/90/90. The FRL is applicable for exposure to fire source from the tested side (QT EcoSeries Wall Panel side).

Fire Test – FS3685-2695————– Specimen – Typical Cross Section Fire Rated Vertical Control Joint———— Fire Rated Horizontal Control Joint————

FRL – 90 Minutes

To achieve a 90 minute Fire Rating the wall must be constructed so as the wall consists of two layers of 13mm thick fire resistance plasterboard affixed to the timber frame internally and one layer of fire resistant building foil, one layer of 50mm QT EcoSeries Wall Panel with a 5-8mm render applied with finish, affixed directly to a 20-50mm battened out cavity. This system would be capable of achieving Fire Resistance Levels of -/90/90 for Non Load Bearing walls and 90/90/90 for Load Bearing Walls designed in accordance with AS1684 for fire exposure from either direction if tested in accordance with AS1530.4

90 Minute Fire Rated Wall

Extended Wall Areas

The Fire Resistance Levels of 60 & 90 minutes would still apply to the same system extended in height in modular form provided that the structural members are designed in accordance with the relevant structural design code for the height and load of actual installation and an approved joint system appropriate to the FRL and the width of the gap is used for the horizontal and vertical joints in a manner as detailed in the attached drawings.

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Jan 11

CSR Hebel Design Approach

There are 2 methods of construction – typical and tie-down. Typical is the most common method of building whilst the tie-down method is required for cyclonic or high wind areas (as determined by an engineer). This guide provides information for both building methods.

Important Note

It is the responsibility of the architectural designer and engineering parties to ensure that the information in the Hebel PowerBlocks Design and Installation Guide is appropriate for the intended application. The recommendations of this guide are formulated along the lines of good building practice, but are not intended to be an exhaustive statement of all relevant data. Hebel  accepts no responsibility for or in connection with the quality of the recommendations or their suitability for any purpose when installed.

Scope

The Hebel® PowerBlocks Design and Installation Guide has been created to provide information for detached residential buildings. The design information in this guide has been condensed from the Hebel® Technical Manual and AS3700 Masonry structures. The design basis is AS3700 Masonry structures, Section 12 Simplified design of masonry for small buildings. The footing and slab design is based on AS2870 Residential slabs and footings – Construction.

Refer to Table 6.1 for Building Geometry Limitations.

Design Parameters

The structural design information in this guide is based on the data and assumptions in Table 6.2, 6.3 and 6.4.

Design Sequence

Fig. 6.1 details Hebel® recommendations for how to design a Hebel® PowerBlock home.

Design Flow Chart

Determine the soil classification, terrain category and wind region/loads

Footing type (slab or strip footing)

PowerBlock™ design based on BCA requirements, loadings, wall heights
and lengths (external & internal)

Design the bracing and tie down methods

Determine any additional BCA requirements (thermal, fire and sound ratings)

Complete project documentation (drawings & specification)

Table 6.1: Buiding Geometry Limitations

2 storeys max
Max. height to underside of eaves 6.0m
Max. height to top of roof ridge 8.5m
Max. building width incl. verandah but not eaves 16.0m
Max. building length 5x width
Max. lower storey wall height 3.0m
Max. upper storey wall heigh 2.7m
Max. floor load width on external wall 3.0m (6.0m single span floor)
Max. roof load width on external wall 3.0m (6.0m rafter/truss span)
Max. floor load width on internal wall 6.0m

 

Where the building geometry is outside the above limitations, the designer must refer to the Hebel® Technical Manual and AS3700 Sections 1-11.

Table 6.2: Design Parameters.

Hebel® PowerBlock™ material properties
Nominal Dry Density 470 kg/m2
Working Density (S.T.) 611 kg/m2
Working Density (L.T.) 500 kg/m2
Characteristic Compressive Strength, f’m 2.25 MPa
Characteristic Flexural Tensile Strength, f’mt 0.20 MPa
Characteristic Shear Strength, f’ms 0.30 MPa
Characteristic Modulus of Elasticity, EST 1125 MPa
Characteristic Modulus of Elasticity, ELT 562 MPa

 

Table 6.3 Design Parameters – Permanent and Imposed Actions

Permanent Actions (Dead Loads):
Floor – Superimposed 1.00 kPa
Roof – Tile 0.90 kPa
Roof – Sheet 0.40 kPa
Framed Floor/Deck – Timber 0.50 kPa
Framed Deck – Tile 0.50 kPa
Pergola Roof – Tile 0.80 kPa
Pergola Roof – Sheet 0.32 kPa
Hebel® PowerFloor System 0.80 kPa
Hebel® Floor Panel System – 250mm 1.90 kPa
Hebel® PowerBlock Wall – 250mm, 2700mm (H 4.60 kN/m
Hebel® PowerBlock Wall – 150mm, 2700mm (H) 2.76 kN/m
Imposed Actions (Live Loads):
In accordance with AS 1170. 1:2002
Floor – general 1.50 kPa
Deck 2.00 kPa

Table 6.4  Design Parameters – Wind Actions (General wall areas)

Wind Classification(AS4055) Wind Pressure (kPa)
Serviceability, Ws Ultimate, Wu
N1 0.41 0.69
N2 0.41 0.96
N3 0.61 1.50
N4 0.91 2.23
N5 1.33 3.29
N6 1.82 4.44
C1 0.61 2.03
C2 0.91 3.01
C3 1.33 4.44
C4 1.82 5.99

Hebel PowerBlock home

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Jan 09

CSR Hebel Structure

Slabs and Strip Footings

Site Classification

Site Classifications are generally carried out for new housing developments, be they part of a subdivision or an individual allotment. The purpose of the site classification is to assess the subsurface conditions and therefore enable determination of the most appropriate foundations/ floor slabs (i.e. the classification will generally determine the appropriate dimensions for house footings and / or floor slabs).

Site Classification is carried out in accordance with the Australian Standard AS2870-1996: “Residential Slabs and Footings”.

The available Classes include S (slightly reactive), M (moderately reactive), H (highly reactive), E (extremely reactive), or P (problem site). Classes S, M, H, and E refer generally to sites in which clayey soils will form the founding strata. The classification indicates how reactive the clay subsoil is to changes in moisture content. The reactivity (shrinking and swelling) of the clay can have a significant impact on the footings/slabs of a building slab, which need to be designed to counteract the movements of the clay soils.

Sites classified as Class P generally present difficulties for the proposed construction. The P classification more often than not suggests deep and/or uncontrolled fill, which cannot provide suitable bearing for the house. In these situations, the house is either founded on the stable materials beneath the fill (i.e. deep footings/piers), or the fill is removed and replaced with compacted, controlled fill.

Slab Design

All Hebel PowerBlock homes must have footings and slabs designed to AS 2870Full Masonry”. Local engineering advice should always be sought.

Fig 7.1.1 Isometric Concept House Fig 7.1.2:  Slab on Ground Table 7.1.1 Slab on Ground

SITE CLASS TYPE OF CONSTRUCTION EDGE AND INTERNAL BEAMS SLAB MESH
Depth (d) mm Bottom Reinforcement Max. Spacing Centre to Centre (m) Setdown (s) mm Width (b) mm Slab Length <18m Slab Length <18m & <25m Slab Length <25m & <30m
CLASS ‘A’ Hebel Masonry Wall 400 3-L8TM 50 350 SL72 SL82 SL92
400 3-L8TM 100 350 SL72 SL82 SL92
400 3-L8TM 150 400 SL72 SL82 SL92
400 3-L8TM >200 450 SL72 SL82 SL92
CLASS ‘S’ Hebel Masonry Wall 400 3-L11TM 5.0 (Note 1) 50 350 SL72 SL82 SL92
400 3-L11TM 5.0 (Note 1) 100 350 SL72 SL82 SL92
400 3-L11TM 5.0 (Note 1) 150 400 SL72 SL82 SL92
400 3-L11TM 5.0 (Note 1) >200 450 SL72 SL82 SL92
CLASS ‘M’ Hebel Masonry Wall 500 3-L12TM 4.0 50 350 SL82 SL82 SL92
500 3-L12TM 4.0 100 350 SL82 SL82 SL92
500 3-L12TM 4.0 150 400 SL82 SL82 SL92
500 3-L12TM 4.0 >200 450 SL82 SL82 SL92
CLASS ‘M-D’ Hebel Masonry Wall SITE SPECIFIC ENGINEERING REQUIRED
CLASS ‘H’ Hebel Masonry Wall SITE SPECIFIC ENGINEERING REQUIRED
CLASS ‘H-D’ Hebel Masonry Wall SITE SPECIFIC ENGINEERING REQUIRED
CLASS ‘P’ Hebel Masonry Wall SITE SPECIFIC ENGINEERING REQUIRED

GENERAL NOTE: This table is to be read in conjuntion with the requirements of AS2870 and AS3600. NOTES:

  1.  A 10% increase in the spacing is permitted where the spacing in the other direction is 20% less than specified.
  2. Where the number of beams in a particular direction satisfies the requirements of the maximum spacing given above, the spacing between individual beams can be varied provided that the spacing between any two beams does not exceed the spacing given in the above figure by 25%. These allowances for increased beam spacings do not override the maximum spacings between edge beams and first internal beams as required by clause 5.3.9.
  3. For two storey timber framed floor or Hebel floor panel construction, the width of the edge beams must be increased by 100mm and the bottom reinforcement must be increased by one bar of the same diameter.

Fig 7.1.3:  Strip Footing, Double Brick Sub-Floor

Fig 7.1.4:  Strip Footing, Concrete PowerBlock Sub-Floor

Table 7.1.2 – Strip Footing

Site Class Type of Construction Depth (d) mm Width (b) mm Reinforcement
CLASS  ‘A’ Hebel Masonry Wall 300 450 4-L8TM
CLASS ‘S’ Hebel Masonry Wall 400 450 4-L11TM
CLASS ‘M’ Hebel Masonry Wall 600 450 4-L12TM
CLASS ‘M-D’ Hebel Masonry Wall Site Specific Engineering Required
CLASS ‘H’ Hebel Masonry Wall Site Specific Engineering Required
CLASS ‘P’ Hebel Masonry Wall Site Specific Engineering Required

GENERAL NOTE: This table is to be read in conjunction with the requirements of AS2870 and AS3600. NOTES:

  1. For all beams 700mm or deeper, as specified in the table above, internal footings shall be provided at no more than 6m centres, and at re-entrant corners to continue the footings to the opposite external footing.
  2. Internal strip footings shall be of the same proportions as the external footing and run from external footing to external footing ‘side slip joints’ consisting of a double layer of polyethylene shall be provided at the sides of the footing only.
  3. Provide ventilation to the sub-floor in accordance with the BCA.

Sub-Floors On Elevated Sites Hebel PowerBlock must not be used at or below ground level. When building a Hebel PowerBlock structure on a sloping site that is not suitable for a concrete slab, a solid core-filled concrete block or brick substructure may be erected on a strip footing to raise the building and floor system to a level that is clear of the ground resulting in a level building platform that allows sufficient airflow under the floor. The first course of Hebel PowerBlocks must be laid on a DPC to stop rising damp and to act as a bond breaker between the different building elements. Termite Protection Hebel PowerBlocks are not a food source for termites. Solid wall construction still requires termite protection. There are many methods to protect your home against a termite invasion and a qualified professional pest control should be consulted to determine the most suitable method for your design. The Building Code of Australia recognises an exposed slab edge to a depth of 75mm above finished ground level as adequate termite prevention. For masonry sub-floor construction a continuous ant cap installed between the brick/ concrete block work and the Hebel PowerBlock also satisfies the Building Code of Australia termite protection requirements.

Hebel PowerBlock Walls

Generally, the minimum recommended wall thickness is:

  • 250mm for external walls
  • 150mm for internal load-bearing walls.
  • 100mm for internal non-load bearing walls.

Hebel suggests considering a wall as having top and bottom lateral restraints only (one-way vertical span) and designing the appropriate wall thickness, so that retrofitting or changing the location of the movement joints will not be detrimental to the lateral load capacity of the wall. In determining the appropriate wall thickness, the designer shall consider a range of factors relating to relevant codes and project specific considerations, these factors may include:

  • Movement joint location
  • Bracing considerations
  • Vertical (compression) loading
  • Out of plane wind/earthquake (lateral) loading
  • Required fire rating level (FRL).

The particular project loading configurations could result in walls that exceed the above minimum requirements. Ring Beam (for standard trussed roofs) A ring beam must be provided at the base and top of perimeter Hebel walls. The ring beam is 60mm x 60mm with 1N12 bar centrally located. Shear connection ties are to be placed at the location of control joints at 600mm spacings (vertically). See Fig 7.2.1 for ring beam details.

Fig 7.2.1 Typical Hebel Ring Beam Detail

Bond Beam (for vaulted roofs) A bond beam is a continuous beam around the perimeter of a building for the purpose of providing lateral stability and bracing to the walls for vaulted/ cathedral roofs, to minimise cracking at openings. As a minimum, bond beams are to be located at the top of the walls for each floor level, or at a maximum vertical spacing of 3m. Bond beams are constructed of reinforced concrete which is poured in situ between two Hebel PowerBlocks. The minimum dimension of the bond beam must be 100mm wide and 200mm high. Bond beam reinforcement should be not less than 2 rows of 12mm deformed bars placed top and bottom in the centre of the beam (overlapped at least 400mm where it joins). Where bond beams intersect a control joint, it is important to continue the control joint through the beam. The reinforcing bars must pass through the control joint and terminate 400mm past the joint. Where the reinforcing bars are bridging the control joint, the bars that extend for the 400mmshould be fitted into conduit sleeves to allow the wall to expand and contract without causing excessive stress on the wall. Bond beams must be continuous around a built-in corner. The ring beam at the base is still required. See Fig. 7.2.1.

Fig 7.2.2 Typical Hebel Bond Beam Detail

Compression The assessment of Hebel PowerBlock wall compression capacity in this Design and Installation Guide is based on the scope of this design guide (see Section 6.0 and Table 6.1). Three top support conditions are applicable:

  1. Supporting concrete slab above (see Section 14 and Fig. 14.26).
  2. Supporting floor other than concrete slab above (see Section 14 and Fig. 14.28).
  3. Face supported framed floor (See Section 14 and Fig. 14.27).

No vertical support of the wall is considered as worst case in the compression capacity assessment. Under that constraint and for wall heights up to 3000mm:

  • 250mm load-bearing external PowerBlock walls have adequate compression capacity for all top support conditions.
  • 150mm load-bearing internal PowerBlock walls to 3000mm height have adequate compression capacity for the first two top support conditions, but is not suitable for face loaded framed floors. If face loaded timber framed floors are designed both sides of the wall, their spans are within 20% and loading is the same, this can be considered top support condition 2. Otherwise 250mm Hebel PowerBlock wall is required.

Roof loading on top of the wall through the top plate is considered top support condition 2. Bending 250mm Hebel PowerBlock walls up to 3000mm height have adequate bending capacity without edge support in wind classifications N1 to N3. Table 7.2.1 provides maximum wall lengths between edge restraints for wind classifications N4 to N6 and C1 to C4. Both ends of these walls must have edge support. Edge support must be an engaged perpendicular wall (bracing wall) or a built-in 89x89x5 SHS column. The designer must detail the plate connections at the base and top of the SHS column and specify adequate ties to the Hebel PowerBlock work. Shear Horizontal forces, such as wind and earthquake loading, applied to a building are to be resisted by bracing walls. Bracing walls are located generally at right angles to the walls subjected to these forces. All bracing components in the building shall be interconnected to adequately transfer the imposed loads to the footings.

Table 7.2.1

Wind Classification Maximum Wall Length Between Edge Supports (m)
N4 3.4
N5 2.6
N6 2.1
C1 3.7
C2 2.8
C3 2.1
C4 1.8

Refer to Appendix K in AS3700 for total ultimate racking forces for houses in wind classifications up to N4/C2. Those tables are based on wall height up to 2700mm. For wall height greater than 2700mm up to 3000mm, factor up the loads by 15%. Earthquake categories H1 and H2 are covered by N3/C1 tables and earthquake category H3 is covered by N4/C2 tables. Table 7.2.2 provides ultimate racking capacities of unreinforced 150mm and 250mm Hebel PowerBlock walls. This table does not include sliding which the designer must also check depending on compression loads on wall in all wind cases and dowel action at base of wall through hold-down rods. Lintels General The minimum bearing lengths at the end of all Hebel lintels is 150mm or L/8, whichever is greatest. The bearing PowerBlock must extend past the end of the lintel by min. 100mm. Hebel Lintels Hebel lintels are reinforced sections similar to panels. The lintels are used as supports over doorways, windows and other opening. Lintels shall be installed so that the surface marked ‘THIS SIDE UP’ is uppermost, as the section reinforcement may not be symmetrical. Hebel lintels are not to be cut on-site. Table 7.2.4 presents the range of standard Hebel lintels and the associated capabilities. For larger spans, use structural steel lintels as designed by the project structural engineer. Steel Lintels Can be used to support PowerBlock work above openings. refer to Tables 7.2.5 and 7.2.6. Control Joints During the life cycle of a building, the building and the materials that it is constructed from will move. These movements are due to many factors working together or individually, such as foundation movement (shrinkage and swelling), thermal expansion and contraction, differential movements between materials, climate and soil condition. This movement, unless relieved or accommodated for, will induce stress in the materials, which may be relieved in the form of cracking. To accommodate these movements and relieve any induced stresses, control joints (vertical gaps) shall be installed to minimise cracking in Hebel masonry walls. Location of Control JointsWhere control joints are required they are best positioned:

  • At no more than 6m spacing unless more stringent requirements are specified in accordance with AS 2870.1996.
  • At intersecting walls and columns.
  • At changes of wall height or thickness, or where chases occur.
  • To coincide with movement joints in adjacent elements of structure (floor or roof).
  • At junctions of dissimilar materials.
  • Where architectural or structural features create a ‘weak’ section.

Movement joints are not normally required below DPC level. Construction of Control Joints Straight, unbonded vertical joints are the most common type of control joint. Typically, the vertical joint is 10mm wide and filled with an appropriate backing rod and flexible sealant. Where stability of the design requires continuity across the joint, Hebel control joint ties should be set in every second bed joint. Movement joints must be continuous through the entire block wall and all surface finishes. When the control joint is aligned with a window or door opening, the joint must be continuous and may need to be offset to deal with the lintel spanning the opening. In such a case a slip joint must be provided under that end of the lintel. Control joints must also be continuous through any bond beams which have been installed in the wall. This can be achieved by breaking the bond beam at this joint during it’s construction. To maintain lateral strength and continuity of the bond beam, the reinforcing rods should bridge the joint with one side of the beam having conduits cast in for the rods to slide while still keeping the wall in plane. The control joints should be installed as the wall is being constructed as the joint ties must be installed in the centre of the block ensuring the tie is fully bonded with Hebel adhesive. Service Penetration To penetrate services through Hebel walls, core out an appropriate sized hole (typically 10mm larger diameter than the service) and run the service through. A flexible sealant should be used to seal the gap around the service, this will also prevent any cracking/movement issues that may occur with the stress imposed on the blocks if the services were placed hard against the Hebel PowerBlock.. For penetrations through fire rated walls, an appropriate fire collar must be used with fire rated sealants. To affix the services to the Hebel walls please refer to the fixing guide in this manual. Chasing Services Into Hebel

  • Services should be run through cavities where possible to avoid unnecessary chasing into Hebel.
  • Where chasing is necessary some basic guidelines need to be followed.
  • – All Hebel products 100mm or less must not be chased
  • – All chases must comply with the BCA
  • – The depth of the chase must not exceed 25mm
  • – The width of the chase must not exceed 25mm
  • – The maximum number of chases allowed is 2 chases per 1 metre length of wall.
  • – All chases must be backfilled with a material that will adhere to the wall (Hebel Patch or a sand /cement patching mix).
  • – Chasing can be done with a Hebel Hand Router or a power router fitted with dust extraction.

Table  7.2.2 Unreinforced Wall

Wall Length (mm) Ultimate Racking Capacity (kN)
150mm PowerBlock 250mm PowerBlock
900
1200 0.5
1800 1.0 1.5
2400 1.5 2.5
3000 2.5 4.0
3600 3.5 6.0
4800 6.5 10.5
6000 10.0 16.5

Table 7.2.3 Top-Plate & Hold-Down selection Table

Wind Classification Top Plate & Hold-Down
Tile Roof Sheet Roof
N1 A / B / C B / C
N2 A / B / C D / F
N3 D / F D / F
N4 D / F D / F
N5 E / G E / G
N6 E / G E / G
C1 D / F D / F
C2 E / G E / G
C3 E / G E / G
C4 G G
Legend
A 90×45 F7 timber top plate / 700mm deep strap @ 1200mm ctrs.
B 90×45 F17 timber top plate / 1700mm deep strap @ 2400mm ctrs.
C 90×45 F17 timber top plate / Ф12mm rod @ 2400mm ctrs.
D 90×45 F17 timber top plate / Ф12mm rod @ 1200mm ctrs.
E 90×45 F17 timber top plate / Ф12mm rod @ 900mm ctrs.
F 100x50x3.0 RHS top plate / Ф12mm rod @ 2400mm ctrs.
G 100x50x3.0 RHS top plate / Ф12mm rod @ 1200mm ctrs.

Table 7.2.4: Lintel Selection – Hebel Lintel

Opening Width (mm) Single Storey or Upper Level of Double Storey Lower Level of Double Storey
Tile Roof Sheet Roof
Tiled Roof Sheet Roof Floor Panel PowerFloor Floor Panel PowerFloor
900 A A A A A A
1200 B B B B B B
1500 B B B B B B
1800 C C C C C C
2100 D D D D D D
2400 D D D D D D
2700 E E E E E E
3000 E E E E E E
3300
3600
3900
4200
Legend (Hebel product code)
A 22046 + 22047
B 22038 + 22039
C 22041 + 22042
D 22043 + 22044
E 82066 + 82067

NOTE:Hebel lintel for 250mm external wall comprises 100mm lintel on outside face and corresponding 150mm lintel on inside face. Top plate to bear across both lintels, min. 25mm bearing on 100mm lintel.

Table 7.2.5: Lintel Selection – Equal Angle

Opening  Width  (mm) Single Storey or Upper Level of Double Storey Lower Level of Double Storey
Tile Roof Sheet Roof
Tiled Roof Sheet Roof Floor Panel PowerFloor Floor Panel PowerFloor
900 A A A A A A
1200 A A A A A A
1500 A A D C D B
1800 A A E E E E
2100 B A F E E E
2400 D B F F
2700 E C
3000 E E
3300 E E
3600 E
3900 E
4200 F
Legend
A 2/100X100X6 EA
B 2/100X100X8 EA
C 2/100X100X10 EA
D 2/100X100X12 EA
E 2/150x100x10 UA
F 2/150x100x12 UA

Table 7.2.6: Lintel Selection – Galintel

Opening  Width  (mm) Single Storey or Upper Level of Double Storey Lower Level of Double Storey
Tile Roof Sheet Roof
Tiled Roof Sheet Roof Floor Panel PowerFloor Floor Panel PowerFloor
900 A A A A A A
1200 A A A A A A
1500 A A A A A A
1800 A A A A A A
2100 B A A A A A
2400 E D D D D B
2700 E D D D E D
3000 E E E D E D
3300 E E E
3600 F E
3900 E
4200
Legend
A Multi-Rib T-Bar – 200x200x7
B Multi-Rib T-Bar – 200x200x9
C Traditional T-Bar – 200×10/200×10
D Traditional T-Bar – 250×10/200×10
E Traditional T-Bar – 250×12/200×10

Floor Panel Systems

Hebel Floor Panels are reinforced AAC panels designs as loadbearing components in commercial, industrial and residential construction applications. A preliminary thickness of the floor panel can be determined from table 7.3.1 in this guide. Contact your local distributor to confirm the selected floor panel thickness is adequate for the design parameters of span, load, deflection, limit and fire resistance level rating. After the panels are laid, reinforcing bars are placed between the panels in the recess and around the perimeter of the floor to form the ring anchor system in accordance with Hebel specifications. The joints and ring anchor sections should be lightly pre-wetted, filled with minimum 15 MPa concrete grout, and rodded to ensure complete and level filling of the notch and groove. A mix of CI:S3:A2 (5mm maximum coarse aggregate) with 150mm slump is usually suitable. The grout should completely cover the reinforcing. The hardness of Hebel Floor Panels is greater than the PowerBlocks. When ring anchors are placed accurately and mortar is poured carefully and screeded properly, the surface is level and smooth. When Hebel panels are used in external floor areas such as patios or balconies, it is important to use an approved waterproofing membrane. Hebel Floor Panels provide an excellent, solid, stable base for tile, slate, marble and other hard surface flooring, including bathroom, laundry and other wet area applications. The smooth flat surface is also perfectly suited to carpet, vinyl, timber boards, parquetry and decorative plywood flooring. Panels in General Panels should not be cut on site unless they are ordered as cuttable. It is preferred they are ordered from the factory at the desired length. Where panels have been cut the exposed reinforcing should be with coated with Hebel corrosion protection compound or an approved equivalent. Hebel panels are supplied ready for use. They can be simply and easily laid into position with only the joints needing to be mortared. Installation is therefore largely dry and generally no formwork or bracing is necessary. The reinforcing in the panels is custom designed for each project. Panels installed on Hebel PowerBlock work or steel beans can offer a flooring system that can be laid down exceptionally fast. As well as providing the benefits of rapid construction, differential movement between floors and walls is minimised. Framed Floors Hebel PowerBlock construction can incorporate floor construction using joists. Typically the joists are installed onto bearing plates which distribute the floor loads evenly into the supporting blocks. Hebel PowerBlocks are easily shaped to infill between the joists. The infill blocks will provide support for the blocks above the floor framing. Image 7.3.1:  Installed Floor Panels Table 7.3.1: Hebel® Structural Floor Panels With Flexible Coverings / No Walls Above (L/250 deflection)

Maximum Panel Length (metres)
Live Load (kPa) 1.5 2.0 3.0
Superimposed Dead load (kPa) 0.0 0.5 1.0 0.0 0.5 1.0 0.0 0.5 1.0
PanelThickness(mm) 150 (4.00) 4.00 3.82 3.60 3.94 3.68 3.49 3.64 3.45 3.30
175 (4.50) 4.50 4.40 4.16 4.50 4.25 4.03 4.20 4.00 3.83
200 (5.00) 5.00 5.00 4.73 5.00 4.83 4.60 4.78 4.56 4.38
225 (5.50) 5.50 5.50 5.24 5.50 5.35 5.10 5.30 5.06 4.86
250 (6.00) 6.00 6.00 5.77 6.00 5.88 5.63 5.83 5.58 5.37

With Rigid Coverings / Walls Above (L/600 deflection

Maximum Panel Length (metres)
Live Load (kPa) 1.5 2.0 3.0
Superimposed Dead load (kPa) 0.0 0.5 1.0 0.0 0.5 1.0 0.0 0.5 1.0
PanelThickness(mm) 150 (4.00) 3.77 3.55 3.39 3.54 3.36 3.22 3.20 3.07 2.96
175 (4.50) 4.31 4.09 3.92 4.05 3.87 3.73 3.68 3.55 3.44
200 (5.00) 4.88 4.66 4.48 4.60 4.41 4.26 4.19 4.05 3.94
225 (5.50) 5.42 5.18 4.98 5.11 4.91 4.75 4.66 4.51 4.39
250 (6.00) 5.94 5.70 5.50 5.62 5.42 5.25 5.13 4.98 4.85

NOTES TO FLOOR PANEL TABLES: • Length is calculated based on the minimum bearing. • Minimum bearing is panel length /80 but not less than 60mm. • Maximum clear span is panel length less than 2x minimum bearing. • (Length) is maximum standard panel length in metres. Decks, Verandahs and Pergolas When attaching a deck, verandah roof or pergola to your Hebel PowerBlock Wall, the building designer / project engineer must calculate and determine the loads that will be imposed on the Hebel PowerBlocks. For conditions equal to or less than those outlined in table 7.4.2, a timber or steel waling plate may be attached to the block wall as shown in Section 14 details 14.34 and 14.35. This must be affixed using the appropriate number and type of fixings as outlined in Tables 7.4.1 and 7.4.2. The fixings must be either Fischer Injection Mortar 10mm x 80mm long or Ramset Injection Mortar 12mm x 160mm long. Where the loads that will be imposed on the waling plate exceed the table or the structure is to be detached from the Hebel PowerBlock™ Walls, a detached post and beam structure may be erected adjacent to the Hebel wall which will ultimately transfer the load directly into the foundation. This type of construction must be designed and certified by the project engineer. Table 7.4.1 Deck/Verandah Floor Walling Plate Connection

Deck Flooring     Type Maximum Anchor Spacing (mm)
Joist Span = 1.2m Joist Span = 2.4
Timber 800 400
Tile 600 300

Table 7.4.2 Roof Walling Plate Connection

WindClassification Maximum Anchor Spacing (mm)
Rafter Span = 2.4m Rafter Span = 4.0m
Sheet Roof Tile Roof Sheet Roof Tile Roof
N1 1500 900 900 500
N2 1300 800 750 450
N3/C1 1000 650 600 400
N4/C2 700 550 400 300
N5/C3 450 400 250 250

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Jan 09

CSR Hebel Construction Notes

General Notes

    • These notes and details are to be read in conjunction with the project’s contract documentation.
    • All materials and workmanship shall be in accordance with this Installation Guide, the current edition of the Hebel® Technical Manual and other Hebel® documentation.
    • Refer to architectural drawings for all setting out dimensions.
    • Do not scale drawings, use written dimensions.
    • Should any omission, penetration, cutting of panels, discrepancy or fault exist, contact the designer immediately for a decision before proceeding with work.
    • All load-bearing walls, bearing on Hebel® floor panels, shall be supported separately in accordance with the project engineer’s design.
    • Hebel® accepts no responsibility for the design or selection of supporting walls, lintels, beams, columns or other structural members.
    • Corrosion protection of all structural steelworks shall be specified by the project engineer or architect.
    • The temporary restraint of walls is the responsibility of the builder or installer.
    • PowerBlocks on site should be protected against rain and water saturation. This can best be achieved by leaving the shrink-wrap cap on the top of pallets and covering the top of blockwork if rain threatens. PowerBlocks should not be laid in the rain.

IMPORTANT

  • Ensure engineering tie-down rods are present and located in accordance with the engineer’s documentation.
  • Ensure control joint locations are marked out in accordance with the engineering documentation.

 Coatings

Table 9.1 details Hebel recommendations for Coating System options for Low Rise and Detached Residential construction to deliver a durable, monolithic appearance.
Hebel and Dulux Acratex have developed coating systems designed specifically for the Hebel AAC substrate and warrant these systems for 7 years. Performance requirements for alternate system options are provided. In such circumstances, the project specifier must satisfy themselves that systems are engineered and suitable for relevant project requirements.
General purpose, site or pre-bagged sand and cement renders must not be used on Hebel PowerBlock™ walls, owing to potential variability and unsuitability of formulation for Autoclaved Aerated Concrete (AAC).

Conventional exterior low build paint systems must not be used, as their ability to accommodate normal expansion and contraction in order to maintain a crack free protective layer is not assured.

Refer to “High Performance Coating Systems” brochure on the website, for more information.

Reinforcing Mesh Installation

Fully meshing all rendered Hebel surfaces using alkali-resistant glassfibre mesh is recommended to assist in maintaining render integrity and minimising consequential cracking.
The minimum requirement is to mesh at corners of wall openings (doors and windows) to minimise corner cracking. The mesh should be embedded into the wet first pass of Hebel
HighBuild.

Linings

Plasterboard can be direct fixed to internal Hebel PowerBlock™ walls. It is recommended that battens be used behind plasterboard linings on the inside surface of external walls. Fibre
Cement sheet linings must be installed on battens.

Table 9.1 Coating systems for Hebel PowerBlock

Primer Acrylic Texture Body Coat Finish Coats
Hebel
Product
Finish
Style
Surface
Aignment
Base
Render or
Levelling
Coat
Product
Description &
Performance
Guide
Dulux
AcraTex
Specification
Product
Description &
Performance
Guide
Dulux
AcraTex
Specification
Product
Description &
Performance
Guide
Dulux
AcraTex
Specification
Comment
PowerBlock Uniform
Sand
Texture
profile
≤3mm Hebel
HighBuild™
(Render)
Relevant to
coatings supplier
recommendations
AcraPrime
501/1
OPTION 1:
1-2mm Acrylic
Texture
Trowel applied
Type: AS4548.4
Polymercontent (dry):
9% min.
Tuscany
orCoventry
Coarse
Elastomeric
Membrane
Type:
AS4548.1
Min DFT:
150 micron
AcraShield
Matt
or
Elastomeric
201
2nd coat
Elastomeric
Membrane
recommended
dependant on
project
complexity
eg. unbroken
broadwall,
scaffolding or
cutting in detail
and coastal areas.
OPTION 2:
Dependant on specifier
approval:
Sponge finishing of Hebel
HighBuild™ to a project
approved standard; plus
Elastomeric Membrane
finishing system.
Elastomeric
Membrane
Type:
AS4548.1
Min. DFT:
250 micron
Elastomeric
201
Hebel
recommends the
installation of
1-2mm Acrylic
Texture Coat over
the render base
coat providing
improved
consistency of
finish, system
flexibility and
durability.

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Jan 09

Fixings for use with Hebel

LIGHT DUTY UP TO 20 kg

Door bell, light fittings, taps

Product Diameter Length Max.Load
Coarse thread screw 10 – 12g 50mm 25kg
Mungo Nylon Plug – MN4 4mm 20mm 2kg
Hilti impact anchor – HPS-1 5mm 30mm 3kg
Mungo Nylon Plug – MN5 5mm 25mm 4kg
Hilti impact anchor – HPS-1 6mm 40mm 4kg
Ramset Ramplug – nylon 5mm 25mm 5kg
Mungo Nylon Plug – MN6 6mm 30mm 6kg
Hilti impact anchor – HPS-1 6mm 50mm 6kg
Mungo Nylon Plug – MN7 7mm 35mm 7kg
Ramset Ramplug – nylon 6mm 30mm 8kg
Fischer – 4 expansion plug 8mm 40mm 8kg
Mungo Nylon Plug – MN8 8mm 40mm 9kg
Ramset Ramplug – nylon 7mm 35mm 12kg
Ramset Ramplug – nylon 8mm 40mm 16kg
Ramset Ramplug – long 6mm 55mm 16kg
Mungo Nylon Plug – MN10 10mm 50mm 20kg
Tox TFS-L fixings 6mm 50mm 20kg

HEAVY DUTY 50kg – 120kg
Grab rails, hose reels

Product Diameter Length Max.Load
Hilti-RE500 Injection adesive 8mm 80mm 50kg
Fischer Turbo plug 8mm 50mm 58kg
Mungo Nylon plug – MN16 16mm 80mm 60kg
Hilti-RE500 Injection adesive 10mm 90mm 70kg
Fischer Turbo plug 10mm 60mm 74kg
Hilti-RE500 Injection adesive 12mm 110mm 90kg
Mungo Nylon plug – MN20 20mm 90mm 100kg
Mungo Nylon Frame anchor 10mm 80mm 110kg
Mungo Nylon Frame anchor 10mm 100mm 110kg
Mungo Nylon Frame anchor 10mm 120mm 110kg
Mungo Nylon Frame anchor 10mm 200mm 110kg
Ramset Injection Mortar 10mm 130mm 120kg
Tox-KD-DV Heavy D Toggle 10mm 100mm 120kg
Tox-KD-DV Heavy D Toggle 10mm 200mm 120kg
Fischer Injection Mortar 8mm 80mm 121kg
Fischer Injection Mortar 10mm 80mm 125kg
Ramset Injection Mortar 12mm 160mm 125kg

MEDIUM DUTY 20-50
Large light fittings

Product Diameter Length Max.Load
Ramset Ramplug – long 8mm 65mm 22kg
Ramset Ramplug – nylon 10mm 50mm 25kg
Fischer 4 expansion plug 10mm 50mm 25kg
Fischer twist plug GB 8mm 50mm 25kg
Fischer Universal Frame fix 10mm 50mm 25kg
Tox Metal claw plug 6mm 32mm 25kg
Ramset Ramplug – long 10mm 80mm 27kg
Ramset Ramplug – long 12mm 95mm 28kg
Powers Zip-it 6mm 30mm 28kg
Hilti Frame anchor – HRD-U 10mm 80mm 30kg
Hilti Frame anchor – HRD-U 10mm 100mm 30kg
Tox-VLF Frame fixings 6mm 70mm 30kg
Ramset Ramplug – nylon 12mm 60mm 35kg
Tox Metal claw plug 8mm 60mm 35kg
Mungo Nylon plug – MN12 12mm 60mm 40kg
Fischer twist plug GB 10mm 55mm 40kg
Tox TFS-L fixings 8mm 70mm 40kg
Tox-VLF Frame fixings 8mm 100mm 40kg
Fischer Turbo plug 6mm 50mm 44kg
Mungo Nylon plug – MN14 14mm 70mm 50kg
Tox TFS-L fixings 10mm 70mm 50kg
Tox-VLF Frame fixings 10mm 135mm 50kg

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Jan 06

Hebel Construction Details – Tie-down

Required only if specified by design /project engineer.

Fig 15.1: Strip Footing, Double Brick Sub-Floor

Fig 15.2:  Strip Footing, Concrete Power Block Sub-Floor

Wall Length(mm) Min. No. of N12 Bars Ultimate Racking Capacity (kN)
150mm PowerBlock

250mm PowerBlock

900 2 5 6
1200 2 8 8
1800 3 16 18
2400 3 24 25
3000 4 36 38
3600 5 45 46
4800 6 54 56
6000 7 63 66

Tie down rods/engineering restraints must be embedded into the footing and pass up through the sub floor and into the Hebel PowerBlock work.

Table 15.1 Top-Plate & Hold-Down selection

Wind
Classification
Top Plate & Hold-Down
Tile Roof Sheet Roof
N1 A / B / C B / C
N2 A / B / C D / F
N3 D / F D / F
N4 D / F D / F
N5 E / G E / G
N6 E / G E / G
C1 D / F D / F
C2 E / G E / G
C3 E / G E / G
C4 G G
Legend
A 90×45 F7 timber top plate / 700mm deep strap @ 1200mm ctrs.
B 90×45 F17 timber top plate / 1700mm deep strap @ 2400mm ctrs.
C 90×45 F17 timber top plate / Ф12mm rod @ 2400mm ctrs.
D 90×45 F17 timber top plate / Ф12mm rod @ 1200mm ctrs.
E 90×45 F17 timber top plate / Ф12mm rod @ 900mm ctrs.
F 100x50x3.0 RHS top plate / Ф12mm rod @ 2400mm ctrs.
G 100x50x3.0 RHS top plate / Ф12mm rod @ 1200mm ctrs.

Fig 15.3 Hold Down Detail for Reinforced Bracing Walls

Table 15.2 provides ultimate racking capacities of reinforced 150mm and 250mm Hebel PowerBlock walls. The reinforcement is N12 bar or 12mm threaded rod at nominal 1000mm centres. The reinforcement must be tied to the footings and wall top plate through the bond beam.

Walls resisting racking forces should be evenly distributed within a house and spaced at a maximum of 8.0m. Ceiling and floor diaphragms must be adequately tied to walls to ensure transfer of forces through to the footings.

For more information about bracing, refer to Section 6.11 of the Hebel Technical Manual.

Fig 15.4 Roof Top to Plate Fixing to Hebel Wall – Strap (elevation)

Top Plate Hold-Down

Two tie-down methods are provided in this design guide.

1. Strap – 30×0.8mm cut into inside face of external wall min. 700mm deep.
2. 12mm threaded rod continuous from footing through bond beam to top plate.

Fig 15.5 Roof Top Plate Fixing to Hebel Wall-Tie-Down Rod (elevation)

Three top plates options are provided in this design guide:

1. 90×45 F7 timber
2. 90×45 F17 timber
3. 100x50x3.0 RHS

The type of hold-down method and spacing depends on the top plate, roof type/span, and wind classification. Refer to Table 15.1 for specifications. For high wind areas, the bracing design is likely to require tie-down rods which will drive that as the hold-down method.

Table  15.2 Reinforced Wall – N12 Bars at Nom. 1000mm CTRS

Wall
 Length
 (mm)
Min. No. of
 N12 Bars
Ultimate Racking Capacity (kN)
150mm PowerBlock 250mm PowerBlock
900 2 5 6
1200 2 8 8
1800 3 16 18
2400 3 24 25
3000 4 36 38
3600 5 45 46
4800 6 54 56
6000 7 63 66

Base of Wall

Fig 15.6 Hebel PowerBlock work on Stiffened Raft Slab Edge Foundation (elevation)

 Fig 15.7  Concrete PowerBlock Sub-Floor Detail (elevation)

 Fig 15.8  Double Brick Sub-Floor Detail (elevation)

Fig 15.9 Ring Beam Internal Non-Loadbearing Wall (elevation) (No tie down – as specified by design engineer)

Top of Wall

Fig 15.10 Roof Top Plate Fixing to Hebel Wall – Tie-Down Rod ( elevation)

Fig 15.11 Internal Hebel Load Bearing Wall and Timber Floor Frame Junction (elevation)

Wall Junctions

Fig 15.12  External Wall and Internal Partition Wall Junction  (plan).

Fig 15.13  External Corner with Control Joint (plan)

Control Joints

Fig 15.14 Control Joint detail (elevation)

Fig 15.15 Typical Bond Beam Control Joint – elevation (Location where no tie down required – as specified by engineer)

Fig 15.16 Typical Ring Beam Control Joint – elevation (Location where no tie down required – as specified by engineer)

Fig 15.17 Typical Control Joint – plan 

Fig 15.18 Hebel PowerBlock work Typical Movement Joint Detail (elevation)

Fig 15.19 Hebel PowerBlock work Typical Movement Joint Detail (plan)

Fig 15.20 Built-in Column Detail (plan)

Fig 15.21 Built-in Column Detail (elevation)

Appendix A – Carpet Installation

Panel Surface Preparation

Sweep the floor surface to remove debris and loose

particles. Expose all surface blemishes such as chips, cracks, gaps, ridges or the like. Fill all unacceptable locations with an appropriate and compatible patching compound such as Hebel Patch or levelling compound as required.

Ensure panels are then dry.

Carpet Smooth Edge Installation

Installation of Carpet Smooth Edge (Gripper) is to be in accordance with AS/NZS 2455.1:1995.

Installation of carpet gripper prior to laying carpet requires the use of specifically selected nails or course threaded screws. Standard fixings supplied with the carpet gripper are not suitable for fixing to Hebel PowerFloor panels. Carpet gripper strips are available without factory supplied nails. For carpet gripper installation near the panel edge, only glue is recommended. If relying on glue only, the carpet can not be stretched until the glue is set after approximately 24 hours.

Table A.1 – Carpet Smooth Edge Fixings

Fixing Type Description Application
Method
Installation Notes
Twist Nails 51mm dome
head twist nail
Coil Nail Gun
(Refer to Fig A.1)
The head of the twist nail
should finish flush with
the surface of the gripper
strip
Screws Type 17 point
– course thread
No. 8g x 50mm
– Countersinking
screw
Makita 6834
Auto Feed
Screwdriver
(Refer to Fig A.2)
The head of the twist nail
should finish flush with
the surface of the carpet
gripper strip
Screws Type 17 point Trimhead deck
Screw.
4.2 x 50mm
4.2 x 65mm
Quickdrive auto feed The head of the screw
should be flush with the
smooth edge

Fig A.1                       Fig A.2

Underlay Installation

Minimum medium duty underlay is to be used. No other special requirements.

Carpet Installation

As per carpet manufacturer’s guidelines.
No other special requirements.

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