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SPECIFIC FIXING REQUIREMENTS—WIND CLASSIFICATION N2 SHEET ROOF

Joint or member

Rafter or truss span

mm

Specific fixing requirements Spacing of fixing along plate, mm

600 1 200 1 800

Bottom plates to floor frame or slab

3 000 Nominal fixing Nominal fixing 30 × 0.8 mm G.I. strap 2/30 × 2.8 mm ∅ nails each end or two framing anchors or M10 masonry anchor

6 000 Nominal fixing 30 × 0.8 mm G.I. strap or one framing anchor or M10 masonry anchor

30 × 0.8 mm G.I. strap 3/30 × 2.8 mm ∅ nails each end or two framing anchors or M10 masonry anchor 9 000 30 × 0.8 mm G.I. strap or one framing anchor 30 × 0.8 mm G.I. strap 3/30 × 2.8 mm ∅ nails each end or two framing anchors or M10 masonry anchor

30 × 0.8 mm G.I. strap 4/30 × 2.8 mm ∅ nails each end or M10 masonry anchor

12 000 30 × 0.8 mm G.I. strap or one framing anchor 30 × 0.8 mm G.I. strap 4/30 × 2.8 mm ∅ nails each end or two framing anchors or M10 masonry anchor

30 × 0.8 mm G.I. strap 6/30 × 2.8 mm ∅ nails each end or M10 masonry anchor

Top and bottom plates to studs

3 000 30 × 0.8 mm G.I. strap at 1800 mm max. centres along wall 2/30 × 2.8 mm ∅ nails to each end of strap

6 000 30 × 0.8 mm G.I. strap at 1200 mm max. centres along wall 3/30 × 2.8 mm ∅ nails to each end of strap

9 000 30 × 0.8 mm G.I. strap at 1200 mm max. centres along wall 6/30 × 2.8 mm ∅ nails to each end of strap

12 000 30 × 0.8 mm G.I. strap at 1200 mm max. centres along wall 6/30 × 2.8 mm ∅ nails to each end of strap

(continued)

Joint or member Rafter or Specific fixing requirements Rafters to top plates, beams or studs—Non- coupled roofs— No ridge tie- down but rafters tied at ridge Rafter spacing, mm 600 900 1 200 3 000 (single) 30 × 0.8 mm G.I. strap or one framing anchor (see Figure 9.3(a) or (b) for ridge connection)

30 × 0.8 mm G.I. strap or one framing anchor (see Figure 9.3(a) or (b) for ridge connection)

30 × 0.8 mm G.I. strap or one framing anchor (see Figure 9.3(a) or (b) for ridge connection) 6 000

(single)

30 × 0.8 mm G.I. strap or one framing anchor (see Figure 9.3(a) or (b) for ridge connection)

30 × 0.8 mm G.I. strap 3/30 × 2.8 mm ∅ nails or two framing anchor (see Figure 9.3(a) or (b) for ridge connection)

30 × 0.8 mm G.I. looped strap 4/30 × 2.8 mm ∅ nails each end

(see Figure 9.3(b) or (c) for ridge connection) 3 000

(continuous)

30 × 0.8 mm G.I. strap or one framing anchor (see Figure 9.3(a) or (b) for ridge connection)

30 × 0.8 mm G.I. strap 3/30 × 2.8 mm ∅ nails or two framing anchor (see Figure 9.3(a) or (b) for ridge connection)

30 × 0.8 mm G.I. looped strap 4/30 × 2.8 mm ∅ nails each end

(see Figure 9.3(b) or (c) for ridge connection) Rafters to top plates, beams or studs—Non- coupled roofs— Ridge tie-down 3 000 (single) 30 × 0.8 mm G.I. strap or one framing anchor

30 × 0.8 mm G.I. strap or one framing anchor

30 × 0.8 mm G.I. strap or one framing anchor 6 000

(single)

30 × 0.8 mm G.I. strap or one framing anchor

30 × 0.8 mm G.I. strap or one framing anchor

30 × 0.8 mm G.I. strap or one framing anchor 3 000

(continuous)

30 × 0.8 mm G.I. strap or one framing anchor

30 × 0.8 mm G.I. strap or one framing anchor

30 × 0.8 mm G.I. strap or one framing anchor Rafters to top plates, beams or studs—Coupled roofs—No ridge tie-down (see Note 4) 3 000 (single) 30 × 0.8 mm G.I. strap or one framing anchor (see Figure 9.3(a) or (b) for ridge connection)

30 × 0.8 mm G.I. strap or one framing anchor (see Figure 9.3(a) or (b) for ridge connection)

30 × 0.8 mm G.I. strap or one framing anchor (see Figure 9.3(a) or (b) for ridge connection) 3 000

(continuous)

30 × 0.8 mm G.I. strap or one framing anchor (see Figure 9.3(a) or (b) for ridge connection)

30 × 0.8 mm G.I. strap 3/30 × 2.8 mm ∅ nails or two framing anchor (see Figure 9.3(a) or (b) for ridge connection)

30 × 0.8 mm G.I. looped strap 4/30 × 2.8 mm ∅ nails each end

(see Figure 9.3(b) or (c) for ridge connection) Rafters to

underpurlins— coupled roofs

3 000

(continuous) Nominal fixing

30 × 0.8 G.I. strap or one framing anchor

30 × 0.8 G.I. strap or one framing anchor

Roof trusses to top plates, beams or studs

Truss spacing, mm

600 900 1 200

3 000 Nominal fixing Nominal fixing Nominal fixing

6 000 Nominal fixing Nominal fixing 30 × 0.8 mm G.I. strap or one framing anchor 4/30 × 2.8 mm ∅ nails each leg

9 000 Nominal fixing 30 × 0.8 mm G.I. strap or two framing anchors

30 × 0.8 mm G.I. looped strap 4/30 × 2.8mm nails each end or two framing anchors 12 000 30 × 0.8 mm G.I.

strap or one framing anchor

4/30 × 2.8 mm ∅ nails each end

30 × 0.8 mm G.I. looped strap 4/30 × 2.8 mm nails each end or two framing anchors

30 × 0.8 mm G.I. looped strap 4/30 × 2.8 mm nails each end.

(continued)

TABLE 9.6 (continued)

Joint or member Rafter or Specific fixing requirements Intermediate

beams, verandah beams and lintels to posts or studs Beam span, mm 1 800 3 600 6 000 3 000 30 × 0.8 mm G.I. strap 3/30 × 2.8 mm ∅ nails each end

30 × 0.8 mm G.I. strap 4/30 × 2.8 mm ∅ nails each end 30 × 0.8 mm G.I. strap 6/30 × 2.8 mm ∅ nails each end 6 000 30 × 0.8 mm G.I. strap 3/30 × 2.8 mm ∅ nails each end

30 × 0.8 mm G.I. looped strap 6/30 × 2.8 mm ∅ nails each end or 2/M10 bolts

2/30 × 0.8 mm G.I. looped strap 4/30 × 2.8 mm ∅ nails each end or 2/M12 bolts

9 000 30 × 0.8 mm G.I. strap

4/30 × 2.8 mm ∅ nails each end or 2/M10 bolts

2/30 × 0.8 mm G.I. looped strap 4/30 × 2.8 mm ∅ nails each end, or M10 vertical tie- down anchor rod to floor frame or footing or 2/M10 bolts

2/30 × 0.8 mm G.I. looped strap 6/30 × 2.8 mm ∅ nails each end or M10 vertical tie-down anchor rod to floor frame or footing or 2/M12 bolts

12 000 30 × 0.8 mm G.I. strap

6/30 × 2.8 mm ∅ nails each end or 2/M10 bolts

2/30 × 0.8 mm G.I. looped strap 6/30 × 2.8 mm ∅ nails each end or M10 vertical tie- down anchor rod to floor frame or footing or 2/M10 bolts.

M12 vertical tie-down anchor rod to floor frame or footing Roof battens to rafters or trusses Rafter or truss spacing mm

Batten spacing, mm (see Note 3)

600 1 200

600 2/75 × 3.05 mm plain shank nails or 1/75 × 3.05 mm deformed shank nail

2/75 × 3.05 mm deformed shank nails 900 2/75 × 3.05 mm deformed shank nails 2/75 × 3.33 mm deformed shank nails 1 200 2/75 × 3.05 mm deformed shank nails 1/75 × No 14 Type 17 Screw

NOTES:

1 Except for nominal fixings, intermediate connections are not required where a connection is continued to a lower member in the frame; for example, connection of a rafter directly to a stud eliminates the need for individual rafter to top plate and to stud connections.

2 Specific tie-down connections in walls are only required in those walls used for tie-down purposes 3 Unless otherwise specified, the minimum penetration into a rafter or truss is 38 mm.

4 Assumed to be adjoining a ceiling joist.

5 For continuous span beams, the centre support requires twice the fixing specified.

TABLE 9.6 (continued)

TABLE 9.7

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