| 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 |
Bracing ratings
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.
Topics include
Bracing
