Multinail Australia

Multinail Hub - External Wall Bearing MultiStrut4 June 2020

External Wall Bearing MultiStrut

Type 1: Walls parallel to MultiStrut joist

MultiStrut Joists may be used to distribute load from an upper-storeyloadbearing wall to a loadbearing lower-storey wall provided the followingconditions are met:

The lower-storey wall frame provides continuous support to theMultiStrut Joist. MultiStrut joist must be placed in line with bothwalls.Studs, wall plates and lintels have been sized in accordance withthe relevant Tables from AS1684.The roof load width (RLW) supported must not exceed that given inTable 7.1 (Refer to Section 2.6.4 of AS1684 Residential timberframed construction for definition of roof load width RLW.Where the roof load width exceeds the spans itemised in Table 7.1then use one of the following options:

MultiStrut Nominal Depth Sheet Roof Conrete Tile Roof

Roof Truss Spacing (mm)

Max 1200 Max 600 Max 900

MS200 2100 3300 1800

MS250 2100 3300 1800

MS300 2100 3300 1800

MS400 Not Suitable Not Suitable Not Suitable

Figure E4-01-02-01 MultiStrut Joist to Support Roof Load

Option 1A - Ladder Truss

A ladder truss is a MultiStrut nogged out at up to 600 centres. This forms a dwarf wall with verticals designed as wall studs and chords designed as ribbon plates inAS1684.

Most of the MultiStrut webs can be eliminated if convenient, and the studs spread to conventional stud spacing. Only the MultiStrut webs required to prevent racking ofthe dwarf wall need to be included.

Figure E4-01-02-02 Ladder Truss Typical Section

Figure E4-01-02-03 MultiStrut Ladder Truss to Support Roof Load

Figure E4-01-02-04 Typical Ladder Trusses

Option 2 - Solid Timber

A solid timber bearer or Multi-Lam Beam to match the MultiStrut Joist depth.This beam is to be designed by others.

Figure E4-01-01-05 Multi-Lam Beam Typical Section

Two-Storey Construction Hip Ends

This is the same as Type 1 with RLW defined as shown in Figure E4-01-02-06

Figure E4-01-02-06 Multi-Lam Beam to Support Jack Loads

Type 2: Single-storey construction

For the support of external loadbearing walls for Single-Storey Construction there are a number of options available:

Use a 45mm wall plate on continuous internal brickwork, ORUse a Bearer taken from AS 1684, ORUse a Multi-Lam Beam.

Figure E4-01-02-07 Multi-Lam Beam or Bearer to Support Roof Load Figure E4-01-02-08 Multi-Lam Beam or Bearer to Support Roof and FloorLoad (Wall perpendicular to MultiStrut Joist)

Single-Storey Construction Hip Ends

This is the same as Type 2 with RLW as shown in Figure E4-01-02-09

Figure E4-01-02-09 Multi-Lam Beam to Support Jack and Floor Loads

Gable Ends

This is the same as Type 1 or Type 2 with RLW = Verge Overhang + Truss Span/2

Type 3: Wall perpendicular to joist

When the external load bearing wall is perpendicular with the joist the loads arepassed through the vertical web directly into the supporting structure below.See Figure E4-01-02-10

Figure E4-01-02-10 Standard Joist Support

Perimeter band beam

The bottom plate of the upper floor wall can be stiffened by the use of aperimeter band beam. This replaces the need for multiple bottom plates. Thesize of the perpendicular band beam is determined by the RLW and spacing ofthe trusses. See Table 7.2.

Figure E4-01-02-11 Perimeter Beam

Perimeter Band Beam Size (minimum 70 x 45 F5 bottom plate to frame over) Sheet Roof Concrete Tile Roof

Roof Truss Spacing (mm)

1200 600 900

70 x 35 F5 5600 4200 2800

90 x 35 F5 7500 5700 3800

120 x 35 F5 7500 7500 5900

Table 7.2 Maximum Roof Load Width Supported by Standard MultiStrut Joists

Due to continual product improvement Multinail Australia Pty Ltd. reserves the right to change the product/s depicted - both in description and specification.This document has to be read in conjunction with Multinail’s Technical Manual.

Note:

Maximum Roof Load Width (RLW) values above are calculated based on joists spacing @ 450mm centers and under wind classification of N2 only.

No supporting structure directly under load bearing wall.

Multistrut Joist are not normally designed to support load bearing walls or conventrated loads other than floor loads.

Multinail engineers and floor design software can run the design of the MultiStrut joist with the above mentioned additional loads but can not ensure that all spans andloads will achieve a design result in a MultiStrut Joist (solid joists/beams may still be required to support the loads).

Multinail Australia

Multinail Hub - External Wall Bearing SpanJoist4 June 2020

External Wall Bearing SpanJoist

Type 1: Walls parallel to SpanJoist joist

SpanJoist Joists may be used to distribute load from an upper-storeyloadbearing wall to a loadbearing lower-storey wall provided the followingconditions are met:

The lower-storey wall frame provides continuous support to theSpanJoist Joist. SpanJoist joist must be placed in line with bothwalls.Studs, wall plates and lintels have been sized in accordance withthe relevant Tables from AS1684.

Figure E4-01-03-01 SpanJoist Joist to Support Roof Load

Option 1A - Ladder Truss

A ladder truss is a SpanJoist nogged out. This forms a dwarf wall with verticals designed as wall studs and chords designed as ribbon plates in AS1684.

Most of the SpanJoist webs can be eliminated if convenient, and the studs spread to conventional stud spacing. Only the SpanJoist webs required to prevent racking ofthe dwarf wall need to be included.

Figure E4-01-03-02 Ladder Truss Typical Section

Figure E4-01-03-03 SpanJoist Ladder Truss to Support Roof Load

Figure E4-01-03-04 Typical Ladder Trusses

Option 2 - Solid Timber

A solid timber bearer or Multi-Lam Beam to match the SpanJoist Joist depth.This beam is to be designed by others.

Figure E4-01-03-05 Multi-Lam Beam Typical Section

Two-Storey Construction Hip Ends

This is the same as Type 1 with RLW defined as shown in Figure E4-01-03-06

Figure E4-01-03-06 Multi-Lam Beam to Support Jack Loads

Type 2: Single-storey construction

For the support of external loadbearing walls for Single-Storey Construction there are a number of options available:

Use a 45mm wall plate on continuous internal brickwork, ORUse a Bearer taken from AS 1684, ORUse a Multi-Lam Beam.

Figure E4-01-03-07 Multi-Lam Beam or Bearer to Support Roof Load Figure E4-01-03-08 Multi-Lam Beam or Bearer to Support Roof and FloorLoad (Wall perpendicular to SpanJoist)

Single-Storey Construction Hip Ends

This is the same as Type 2 with RLW as shown in Figure E4-01-03-09

Figure E4-01-03-09 Multi-Lam Beam to Support Jack and Floor Loads

Gable Ends

This is the same as Type 1 or Type 2 with RLW = Verge Overhang + Truss Span/2

Type 3: Wall perpendicular to joist

When the external load bearing wall is perpendicular with the joist the loads arepassed through the vertical web directly into the supporting structure below.See Figure E4-01-03-10

Figure E4-01-03-10 Standard Joist Support

Due to continual product improvement Multinail Australia Pty Ltd. reserves the right to change the product/s depicted - both in description and specification.This document has to be read in conjunction with Multinail’s Technical Manual.

Perimeter band beam

The bottom plate of the upper floor wall can be stiffened by the use of aperimeter band beam. This replaces the need for multiple bottom plates. Thesize of the perpendicular band beam is determined by the RLW and spacing ofthe trusses. See Table 7.2.

Figure E4-01-03-11 Perimeter Beam

Perimeter Band Beam Size (minimum 70 x 45 F5 bottom plate to frame over) Sheet Roof Concrete Tile Roof

Roof Truss Spacing (mm)

1200 600 900

70 x 35 F5 5600 4200 2800

90 x 35 F5 7500 5700 3800

120 x 35 F5 7500 7500 5900

Table 7.2 Maximum Roof Load Width Supported by Standard SpanJoist Joists

Note:

Maximum Roof Load Width (RLW) values above are calculated based on joists spacing @ 450mm centers and under wind classification of N2 only.

No supporting structure directly under load bearing wall.

SpanJoist Joist are not normally designed to support load bearing walls or conventrated loads other than floor loads.

Multinail engineers and floor design software can run the design of the SpanJoist joist with the above mentioned additional loads but can not ensure that all spans andloads will achieve a design result in a SpanJoist Joist (solid joists/beams may still be required to support the loads).

Multinail Australia

Multinail Hub - External Wall Bearing SteelWood4 June 2020

External Wall Bearing SteelWood

Type 1: Walls parallel to SteelWood joist

SteelWood Joists may be used to distribute load from an upper-storeyloadbearing wall to a loadbearing lower-storey wall provided the followingconditions are met:

The lower-storey wall frame provides continuous support to theSteelWood Joist. SteelWood joist must be placed in line with bothwalls.Studs, wall plates and lintels have been sized in accordance withthe relevant Tables from AS1684.

Figure E4-01-01-01 SteelWood Joist to Support Roof Load

Option 1A - Ladder Truss

A ladder truss is a SteelWood nogged out. This forms a dwarf wall with verticals designed as wall studs and chords designed as ribbon plates in AS1684.

Most of the SteelWood webs can be eliminated if convenient, and the studs spread to conventional stud spacing. Only the SteelWood webs required to prevent rackingof the dwarf wall need to be included.

Figure E4-01-01-02Ladder Truss Typical Section

Figure E4-01-01-03SteelWood Ladder Truss to Support Roof Load

Figure E4-01-01-04 Typical Ladder Trusses

Option 2 - Solid Timber

A solid timber bearer or Multi-Lam Beam to match the SteelWood Joist depth.This beam is to be designed by others.

Figure E4-01-01-05 Multi-Lam Beam Typical Section

Two-Storey Construction Hip Ends

This is the same as Type 1 with RLW defined as shown in Figure E4-01-01-06

Figure E4-01-01-06 Multi-Lam Beam to Support Jack Loads

Type 2: Single-storey construction

For the support of external loadbearing walls for Single-Storey Construction there are a number of options available:

Use a 45mm wall plate on continuous internal brickwork, ORUse a Bearer taken from AS 1684, ORUse a Multi-Lam Beam.

Figure E4-01-01-07 Multi-Lam Beam or Bearer to Support Roof Load Figure E4-01-01-08 Multi-Lam Beam or Bearer to Support Roof and FloorLoad(Wall perpendicular to SteelWood Joist)

Single-Storey Construction Hip Ends

This is the same as Type 2 with RLW as shown in Figure E4-01-01-09

Figure E4-01-01-09 Multi-Lam Beam to Support Jack and Floor Loads

Gable Ends

This is the same as Type 1 or Type 2 with RLW = Verge Overhang + Truss Span/2

Type 3: Wall perpendicular to joist

When the external load bearing wall is perpendicular with the joist the loads arepassed through the vertical web directly into the supporting structure below.See Figure E4-01-01-10

Figure E4-01-01-10 Standard Joist Support

Due to continual product improvement Multinail Australia Pty Ltd. reserves the right to change the product/s depicted - both in description and specification.This document has to be read in conjunction with Multinail’s Technical Manual.

Perimeter band beam

The bottom plate of the upper floor wall can be stiffened by the use of aperimeter band beam. This replaces the need for multiple bottom plates. Thesize of the perpendicular band beam is determined by the RLW and spacing ofthe trusses. See Table 7.2.

Figure E4-01-01-11 Perimeter Beam

Perimeter Band Beam Size (minimum 70 x 45 F5 bottom plate to frame over) Sheet Roof Concrete Tile Roof

Roof Truss Spacing (mm)

1200 600 900

70 x 35 F5 5600 4200 2800

90 x 35 F5 7500 5700 3800

120 x 35 F5 7500 7500 5900

Table 7.2 Maximum Roof Load Width Supported by Standard SteelWood Joists

Note:

Maximum Roof Load Width (RLW) values above are calculated based on joists spacing @ 450mm centers and under wind classification of N2 only.

No supporting structure directly under load bearing wall.

SteelWood Joist are not normally designed to support load bearing walls or conventrated loads other than floor loads.

Multinail engineers and floor design software can run the design of the SteelWood joist with the above mentioned additional loads but can not ensure that all spans andloads will achieve a design result in a SteelWood Joist (solid joists/beams may still be required to support the loads).

Multinail Australia

Multinail Hub - Walls Parallel to MultiStrut Joist4 June 2020

Walls Parallel to MultiStrut Joist

Platform Flooring

With Platform Flooring construction, walls placed Parallel to the MultiStrutJoists do not require additional support.

Figure E4-02-02-01 Support of Internal Non-Load Bearing Wall

Fitted Flooring

If flooring material is fitted to each room after internal walls have beenconstructed an additional MultiStrut Joist is required below the wall to providesupport to both wall and flooring.

Figure E4-02-02-02 Support of Internal Non-Load Bearing Wall Double Joist

Due to continual product improvement Multinail Australia Pty Ltd. reserves the right to change the product/s depicted - both in description and specification.This document has to be read in conjunction with Multinail’s Technical Manual.

Alternatively

Alternatively a single MultiStrut Joist can be placed directly under the wall and apole plate can be fixed to each side to support the flooring material.

Figure E4-02-02-03 Support of Internal Non-Load Bearing Wall pole Plates

Platform Flooring

With Platform Flooring construction, walls placed perpendicular to the MultiStrutJoists do not require any additional support.

Figure E4-02-02-04 Support of Internal Non-Load Bearing Wall

Fitted Flooring

With fitted flooring construction, walls placed perpendicular to the MultiStrut Joistsdo not require any further additional support. A 10mm gap is required between thefloorboard adjacent to the wall bottom plate, and the bottom plate.

Figure E4-02-02-05 Support of Internal Non-Load Bearing Wall

Multinail Australia

Multinail Hub - Walls Parallel to SpanJoist4 June 2020

Walls Parallel to SpanJoist

Platform Flooring

With Platform Flooring construction, walls placed Parallel to the SpanJoists donot require additional support.

Figure E4-02-03 -01 Support of Internal Non-Load Bearing Wall

Fitted Flooring

If flooring material is fitted to each room after internal walls have beenconstructed an additional SpanJoist is required below the wall to providesupport to both wall and flooring.

Figure E4-02-03-02 Support of Internal Non-Load Bearing Wall Double Joist

Due to continual product improvement Multinail Australia Pty Ltd. reserves the right to change the product/s depicted - both in description and specification.This document has to be read in conjunction with Multinail’s Technical Manual.

Alternatively

Alternatively a single SpanJoist can be placed directly under the wall and apole plate can be fixed to each side to support the flooring material.

Figure E4-02-03-03 Support of Internal Non-Load Bearing Wall pole Plates

Platform Flooring

With Platform Flooring construction, walls placed perpendicular to theSpanJoists do not require any additional support.

Figure E4-02-03-04 Support of Internal Non-Load Bearing Wall

Fitted Flooring

With fitted flooring construction, walls placed perpendicular to the SpanJoistsdo not require any further additional support. A 10mm gap is required betweenthe floorboard adjacent to the wall bottom plate, and the bottom plate.

Figure E4-02-03-05 Support of Internal Non-Load Bearing Wall

Multinail Australia

Multinail Hub - Walls Parallel to SteelWood Joist4 June 2020

Walls Parallel to SteelWood Joist

Platform Flooring

With Platform Flooring construction, walls placed Parallel to the SteelWoodJoists do not require additional support.

Figure E4-02-01-01 Support of Internal Non-Load Bearing Wall

Fitted Flooring

If flooring material is fitted to each room after internal walls have beenconstructed an additional SteelWood Joist is required below the wall to providesupport to both wall and flooring.

Figure E4-02-01-02 Support of Internal Non-Load Bearing Wall Double Joist

Due to continual product improvement Multinail Australia Pty Ltd. reserves the right to change the product/s depicted - both in description and specification.This document has to be read in conjunction with Multinail’s Technical Manual.

Alternatively

Alternatively a single SteelWood Joist can be placed directly under the walland a pole plate can be fixed to each side to support the flooring material.

Figure E4-02-01-03 Support of Internal Non-Load Bearing Wall pole Plates

Platform Flooring

With Platform Flooring construction, walls placed perpendicular to theSteelWood Joists do not require any additional support.

Figure E4-02-01-04 Support of Internal Non-Load Bearing Wall

Fitted Flooring

With fitted flooring construction, walls placed perpendicular to the SteelWoodJoists do not require any further additional support. A 10mm gap is requiredbetween the floorboard adjacent to the wall bottom plate, and the bottom plate.

Figure E4-02-01-05 Support of Internal Non-Load Bearing Wall