Floor Truss Strongback Bracing

All open joist truss layout plans include strongback bridging specification and location.

Floor truss strongback bracing. Strongback a 2x6 lateral brace used with its long dimension in a vertical orientation running perpendicular to the trusses and. Deep residential floor system with trusses in lengths up to 19 ft. On bottom chord bearing trusses the ends are tied together with 2x4 ledgers that also serve as a nailing base for the perimeter of the plywood deck see illustration below. Can the strongback bracing end at a truss without tying into an end wall.

Ixing of floor trusses to bracing walls f. Ok back to the question. Strongback bridging is an excellent and inexpensive way to improve the overall rigidity of the floor system and eliminate vibration. Intervals one run for a 20 ft.

Bracing prevents trusses from bending twisting or otherwise deforming. Strongback bracing also satisfies the lateral bracing requirements for the bottom chord of the truss when it is placed on top of the bottom chord is continuous from end to end connected with a method other than metal framing anchor and properly connected by others at the ends. And parallel to floor truss span strongback lateral supports 24 max. The 2x6 serves the same purpose as bridging in a standard floor distributing concentrated loads over a wider area.

Load bearing walla wall specifically. If you need a pathway across the strongback for an hvac or plumbing run you can cut the strongback making sure that no less than 3 joists are connected per strongback segment. Ansi tpi 1 2002 includes information in the commentary to section 7 5 2 4 regarding the use of strongback bridging to reduce the effects of differential deflection in floor trusses. Strongback fixed as recommended end bracing required as nominated in this guide 90mm x 35mm mgp10 diagonal brace 90mm x 35mm mgp10 longitudinal braces connected to diagonal bracing at one end of floor truss run.

Roof floor truss manual 7 31 08 10 43 am page 12. Truss 2x6 strongback august 1 2016 mitek usa inc. Truss two runs for longer trusses. Strongbacks can be altered to allow hvac installations as long as three 3 consecutive joists are attached.

Typically roof live load is snow while floor live loads are furniture human occupancy storage. Strongbacks interconnect joists to share vibration amongst floor members so ideally they run across a maximum number of joists. I am looking for strongback bracing requirements for a 12 in. With floor trusses bracing becomes a permanent part of the floor structure.

For instance can three trusses of a type be tied together by strongbacks then the next series of different trusses be tied together without.