Floor Truss Strongback Bracing

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.

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. 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.

Typically roof live load is snow while floor live loads are furniture human occupancy storage. With floor trusses bracing becomes a permanent part of the floor structure. 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. Underneath 2x6 strongbacks laid on edge should run continuously through the webs of all the trusses at 10 ft.

Strongbacks interconnect joists to share vibration amongst floor members so ideally they run across a maximum number of joists. 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. For instance can three trusses of a type be tied together by strongbacks then the next series of different trusses be tied together without. Strongback bridging is an excellent and inexpensive way to improve the overall rigidity of the floor system and eliminate vibration.

72 5 0 mi ni m u m girder floor truss floor truss jacks a a bearing wall girder floor truss floor truss jacks bearing wall cantilevered floor truss two 2x rim joists 24 max. Ok back to the question. I am looking for strongback bracing requirements for a 12 in. 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.

All open joist truss layout plans include strongback bridging specification and location. It serves to make the floor more comfortable for those living and working in a structure. Load bearing walla wall specifically. Strongbacks can be altered to allow hvac installations as long as three 3 consecutive joists are attached.

Bracing prevents trusses from bending twisting or otherwise deforming. Ixing of floor trusses to bracing walls f. The 2x6 serves the same purpose as bridging in a standard floor distributing concentrated loads over a wider area. Intervals one run for a 20 ft.

Truss two runs for longer trusses.