Bracing ratings

By - , Build 144

Following feedback on the previous article on bracing ratings (Build 141, pages 39–40), we have rounded the ratings for use on existing and renovated walls for a more user-friendly table.

BRACING SYSTEM WALL LENGTH (M) NOGS STRENGTHENING FIXING TYPE FIXING PATTERN RECOMMENDED BRACING RATING – WIND AND EARTHQUAKE
150 × 25 mm let-in brace at 45° 2.4   No   No 75 × 3.15 mm galvanised FH nails Two nails to each stud and three to each plate 40 BUs/brace
90 × 45 mm double brace cut between studs  No 75 × 3.15 mm bright JH nails  Two nails each end of braces  40 BUs/brace pair
Strap brace between top plate and end stud 60 BUs/brace pair
Dogleg brace 0.6 @ 600 mm No      75 × 3.15 mm bright JH nails Two nails each end of braces 15 BUs/brace
45 × 6 mm lath and plaster, no horse hair 2.4 No  25 × 2.5 mm galvanised FH clouts Laths fixed with a single nail 30 BUs/m
200 × 10 mm horizontal board 1.2 40 × 2.8 mm galvanised FH nails Two nails at each board/ stud intersection 20 BUs/m
140 × 20 mm bevelback weatherboard 2.4 Yes        60 × 3.15 mm bright JH nails Weatherboards fixed to studs with a single nail at 40 mm from the bottom of each board 5 BUs/m
Standard plasterboard one side 1.2  30 × 2.5 mm galvanised FH nails  A nail at each corner and at 300 mm centres to all studs and plates  15 BUs/m
Standard plasterboard two sides 40 BUs/m
3.2 mm tempered hardboard one side   1.2   No 30 × 1.6 mm plated panel pins A fastener at each corner and then at 200 mm centres to all studs and plates   25 BUs/m
Add 30 × 2.5 mm nails 30 × 2.5 mm galvanised FH nails 55 BUs/m
Add 30 × 2.5 mm nails and 100% rocking restraint   85 BUs/m
Horizontal corrugated steel 2.4 No  60 × 3.5 mm bright shank leadhead nails  Nails every second ridge to studs, except third ridge one side of lap 35 BUs/m
Vertical corrugated steel 2.4 Nails every second ridge to nogs and plates, except third ridge one side of lap 25 BUs/m

Note

View the orignal article Bracing ratings in Build 141.

Download the PDF

More articles about these topics

Articles are correct at the time of publication but may have since become outdated.

Advertisement

Advertisement