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nail plate (4.7 Kn where required) or wire dog or nails
top plate
stud
25 × 1 mm strap with 6/30 × 2.5 mm nails into both
lintel
25 × 1 mm strap with 6/30 × 2.5 mm nails into both lintel and stud
double stud to be continous between bottom plate and underside of lintel
oor joist or solid blocking
25 × 1 mm strap with 6/30 × 2.5 mm nails into both blocking and stud
stud
bottom plate
dpc
dowel or bolt plate to slab within 150 mm of stud
bottom plate
concrete slab
25 × 1 mm strap under plate and 150 mm up each side of stud
(a) Fixing against lintel and bottom plate uplift.
(b) Alternative xing against bottom plate uplift.
Figure 7 Fixing timber framing against uplift (redrawn from NZS 3604:2011 Figure 8.12).
What is the minimum height of oors?
The minimum height of a oor is generally driven by the pile height.
The tops of piles must be a minimum of
150 mm above ground. A protective coating is required to cut ends of timber. A DPC is required for all concrete piles and for timber pile tops within 300 mm of the ground.
The minimum ooring height will be 150 mm (for the pile) plus bearer depth plus joist depth.
The type of ooring also needs to be considered. For particleboard, the minimum height from the ground to the underside of the particleboard is 550 mm (clause 2.3.7). For treated plywood or solid timber ooring, contact the manufacturer.
Are straps required to x bottom plates to oor joists?
Straps are only required to x bottom plates to oor joists:
● at trimming studs to doors and windows for single-storey buildings
● for the upper oor of multi- oor buildings (see Figure 7).
Bottom plates of non-braced walls require nailing down as set out in Table 7.5 with either:
● 2/100 × 3.75 mm hand-driven nails at 600 mm
centres maximum into oor joists
● 3/gun nails at 600 mm centres maximum into
oor joists.
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