Deep residential floor system with trusses in lengths up to 19 ft.
Floor truss strongback bracing.
For instance can three trusses of a type be tied together by strongbacks then the next series of different trusses be tied together without.
Ixing of floor trusses to bracing walls f.
Can the strongback bracing end at a truss without tying into an end wall.
Typically roof live load is snow while floor live loads are furniture human occupancy storage.
Intervals one run for a 20 ft.
All open joist truss layout plans include strongback bridging specification and location.
I am looking for strongback bracing requirements for a 12 in.
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.
Truss two runs for longer trusses.
The 2x6 serves the same purpose as bridging in a standard floor distributing concentrated loads over a wider area.
Roof floor truss manual 7 31 08 10 43 am page 12.
With floor trusses bracing becomes a permanent part of the floor structure.
It serves to make the floor more comfortable for those living and working in a structure.
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.
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.
Truss 2x6 strongback august 1 2016 mitek usa inc.
Strongbacks interconnect joists to share vibration amongst floor members so ideally they run across a maximum number of joists.
Load bearing walla wall specifically.
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.
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.
Strongback bridging is an excellent and inexpensive way to improve the overall rigidity of the floor system and eliminate vibration.
Ok back to the question.
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.
