Document ID: chunk:federal_register_of_legislation:F2016L00411:reg:63:p1
Version: federal_register_of_legislation:F2016L00411
Segment Type: reg
Provision Reference: reg 63 (pt 1/6)
Character Range: 78645–81760

63                               2.5

2.3 Fixings
Any reference to the use of screws in this section means the use of 10 gauge self-drilling screws
complying with AS 3566. Screws should be long enough to have a minimum embedment length of 35mm into the supporting member.
Fixing for ledgers should be not less than:
    * one 12 mm diameter mild steel bolt, nut and washer
    * where the ledger rests on blocking, a 10 mm mild steel bolt, nut and washer. The blocking should be a minimum 200 mm long of the same cross-sectional area as the ledger and secured by a minimum of two screws to the standard.
Guardrails, midrails, braces and ties should be fixed with a minimum of two screws.

2.4 Standards
Standards should be vertical and pitched on timber soleplates of sufficient area to distribute
imposed loads without observable subsidence.
There should be no cavity under a soleplate immediately below a standard.
Where the height of the scaffold requires joints in the standards, they should be staggered and should not occur:
    •          in adjacent standards in the same lift
    •          in the same standard in adjacent lifts
    •          more than once between adjacent ledgers
    •          more than 300 mm from a ledger.
Joints in standards should be butted and spliced.
The minimum cross-sectional dimensions of standards and the maximum longitudinal and transverse spacing of standards are set out in Table 2.

Table 2 Standards

Minimum nominal size  Duty classification of working platform  Maximum centre-to-centre longitudinal spacing  Maximum centre-to-centre transverse spacing
(mm)
75 x 38               Light duty                               1.2 m                                          660 mm

100 x 38              Light duty                               2.4 m                                          1.2 m

100 x 50              Medium duty                              2.4 m                                          1.2 m

100 x 75              Heavy duty                               2.4 m                                          1.2 m

2.5 Ledgers
Each longitudinal row of standards should be joined on the inside face with horizontal ledgers, with their greater cross-sectional dimension vertical and extending the full length of the scaffold.
The distance between the surface supporting a standard and the first ledger and the distance between vertically adjacent standards should not exceed 2 metres.
The minimum cross-sectional dimensions of ledgers are set out in Table 3.
Joints in ledgers should be butted and spliced. The joints should be staggered and should not occur:
    * in horizontally adjacent ledgers in the same bay
    * in vertically adjacent ledgers in the same bay
    * in the same ledger in the same bay
    * in the end bays of a scaffold

    * more than 300mm from a standard.

Table 3 Ledgers

Minimum nominal sizes (mm)  Duty classification of working platform

75 x 38                     Light duty

100 x 50                    Medium duty

100 x 75                    Heavy duty

2.6 Putlogs
The scaffold should be fixed in the