Structural Work in Playa Vista When the Roof Comes Back as Trusses
Rebuilding a Playa Vista roof with trusses? LADBS looks for the deferred truss submittal and a framing plan that carries every girder load to the ground.
A Playa Vista fire repair that rebuilds the roof with manufactured trusses draws two questions from the LADBS reviewer. Is the truss package listed on the plans as a deferred submittal? And does the framing plan show where every heavy truss lands and what holds it up? The truss maker's calculations often arrive after the main approval, so the plans have to say they are coming and what loads they must carry.
Girder trusses and the posts under them
Some trusses carry other trusses, and those girders bring a concentrated load down at each end. The reviewer follows those points to the ground: a post or built-up studs in the wall below each one, a footing sized for it where the old foundation falls short, and the hanger or strap joining the girder to its support. Our framing plan marks each point with the load the engineer expects, so the truss designer works to the same figures. Where part of the old roof stays, the plans also show how new trusses tie to the rafters that remain.
When the truss package arrives
The truss maker's layout and calculations go first to the engineer of record, who checks them against the framing plan and notes that they fit the design. Then they go to LADBS, and the trusses are set only after that approval comes back. On a coastal lot, plates and hangers in a vented attic sit in moist air that can carry salt, so the plans call for a coating rated for that exposure. At the frame inspection, the inspector compares the truss stamps, the truss bracing and the hardware with the approved package before insulation goes in.
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Structural Work in Playa Vista: questions
Start where the heat rose. A fire sends its worst heat to the attic and the tops of the walls, so we go up first and work down, checking rafters, top plates and the nails that join them. Wood that crumbles under a probe or shows deep char goes on the engineer's list, and so does metal hardware that has bent or lost its coating.
Rebuilding a roof with trusses brings one in, because trusses change where loads land and each girder needs a support drawn to carry it. LADBS also expects stamped work for new beams, footings and braced walls, and for keeping any member the fire charred. Swapping one damaged stud in a wall that carries little may go without, and we confirm that before quoting.
Often, and the new roof gives them a head start. Each truss is tied to the wall top with a clip or strap, and blocking between the trusses carries the roof's sideways force into the braced walls below. Those walls can take plywood bracing and hold-downs at their ends while the framing is exposed. Every connector in that chain gets the same corrosion protection as the truss hardware.
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