For standard roof trusses less than 13m, no bracing to jack trusses is required.
For standard truss spans of 13m to 16m, the single steelbrace shall be arranged in an X-shape configuration. The angle from steelbrace to end wall shall be between 30° and 45°.
The top chord steelbrace for jack trusses shall be arranged in accordance with the following:
Where the Horizontal Top Chord Length (HTL) is less than the Truncated Girder Station (TGS), the steelbrace shall be arranged as shown.
Steelbrace layout for Jack Trusses (HTL < TGS)
Figure C5-04-08-01
Figure C5-04-08-04
Steelbrace layout for Jack Trusses (HTL = 1 to 1.5 TGS)
Where the Horizontal Top Chord Length (HTL) is 1 to 1.5 times the Truncated Girder Station (TGS), the steelbrace shall be arranged as shown.
Figure C5-04-08-02
Steelbrace layout for Jack Trusses (HTL > 1.5 x TGS)
Where the Horizontal Top Chord Length (HTL) is longer than 1.5 times the Truncated Girder Station (TGS), the steelbrace shall be arranged as shown.
Figure C5-04-08-03
