Bracing Requirements Steel Parallel Chord Roof Trusses

Extend parallel to fully recessed purlins to top chord of first pair of trusses.

Bracing requirements steel parallel chord roof trusses.

For standard houses with a wind classification n1 or n2 brace at all supports with type 1 braces at 1800mm centres type 2 at 2400mm or as specified. The subsequent recommendations concern roof trusses on. Methodology for stability of trusses. Regard to wind load requirements and that adequate provision has been.

4 strap edge distance and a minimum of 1. O required permanent truss member bracing locations. This section requires trusses to be braced to prevent rotation and to provide lateral stability. Truss bracing requirements are found in section r802 10 3.

Installation roof trusses b 1 general design aussteel ultimate steel building system trusses have been manufactured in accordance with engineered standards. For non standard houses or houses with a wind classification greater than n2 refer to your supplier for further information. Bracing for three planes of roof this bracing method is for all trusses except 3x2 and 4x2 parallel chord trusses. Place 75 x 25mm bracing on top chord between and parallel to saddle trusses where spacing exceeds roof batten centres.

10 parallel chord tusses bracing for standard houses with a wind classification n1 or n2 brace at all supports with type 1 braces at 1800mm centres type 2 at 2400mm or as specified. This applies to internal and external bearing points. Of the wt chord member to the bottom flange of the w8. Bracing will attach to each endwall column over 7 from corner.

The original roof was designed with a 10 psf superimposed dead load and 20 psf superimposed live load. Nails should be installed in the center of the lumber narrow face and with a minimum edge distance of 1 on the lumber wide face. The roof trusses you are about to install have been manufactured to. Attach using lsta 12 bracket.

These w8 purlins support 1 5 deep roof deck. Locate ground braces for first truss directly in line with all rows of top chord temporary lateral bracing. A b figure 1. To be sure that the trusses perform as designed it is imperative that they be handled assembled and braced correctly.

Nail 2x4 on edge to column side directly behind endwall truss bottom chord. It allows the bracing requirement to be specified in the construction documents or on the individual truss design drawings. This applies to internal and external bearing points. Nails shall be installed in the dimpled areas and placed to maintain a minimum of 1.