Structural Work in Granada Hills
Borate-treated framing, treated sill sections and coated hardware for seismic retrofits in Granada Hills, reviewed by LADBS. Aspenwell Construction.
Borate-treated studs and blocking make up the new wood we add beneath a Granada Hills floor. The borate stays in the fibers and turns away termites and the fungi behind decay, two slow threats to framing in a crawlspace that bakes through hot spells and turns damp after a hard storm. That treated wood carries the plywood bracing, so its life sets the life of the retrofit.
Where the treated wood goes
New cripple studs and the blocking between them come from borate-treated stock. Any length of sill we replace is pressure treated, as the building code requires for wood resting on concrete, and it sits on a foam gasket that keeps moisture rising through the stem wall out of the grain. Copper-based treatments eat bare steel, so connectors touching that sill carry the heavier zinc coating their maker lists for treated wood. Cut ends get brushed with preservative before they go in. The plywood panels are rated for structural use and nailed to the edge pattern on the drawings.
Review and ember choices
Granada Hills plans are reviewed by LADBS because the neighborhood is within Los Angeles city limits. An LADBS inspector sees the bracing before anything covers it. Some of the area is shown on state fire hazard maps, and a lot there can carry ember-resistance requirements. When a foundation vent gets replaced on such a lot, the new one can carry fine metal mesh that stops embers and still lets the crawlspace breathe. Any further requirement depends on the address and the scope of work. The same treated framing and hardware go under houses in Porter Ranch, Northridge and Chatsworth too.
About our structural work serviceEverything we do in Granada Hills
Structural Work in Granada Hills: questions
Bolts and bracing answer two different failures. Without bolts the frame can slide off the concrete, and without plywood on the short walls the floor can drop as they fold. Under a Granada Hills house we count what is already there, and the written findings name the missing piece, or both.
When the house meets the code's limits for a standard retrofit, the prescriptive sheets apply and we complete them. Beams, new footings and soft-story frames go to a licensed structural engineer. LADBS reviews whichever set applies before any work starts.
Wood condition near the ground. We push an awl into the sill and the foot of each stud, looking for soft spots, termite galleries or fungus, since bracing nailed into weak wood holds nothing. Then we count anchor bolts and note how much room the crawlspace leaves to work.
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Describe the house and what it needs. We look at the structure first and send the quote in writing.