Structural Work in Altadena
Already bolted and braced? Aspenwell Construction checks an earlier Altadena retrofit against current details and scopes only the gaps, under county review.
"What happens if you crawl under there and find it was already bolted and braced?" Then the written findings for the Altadena house say so, and they say whether what is there matches current prescriptive details. Earlier retrofits vary. Some have bolts spaced too far apart, plywood nailed too lightly or plates that never bit into the concrete. Where the existing work holds up, the scope can be short.
Checking an earlier retrofit
We count the anchors along each wall line and measure the gaps between them. Each anchor gets a wrench to see whether its nut is tight and whether the bolt turns in its hole. Plywood on the cripple walls gets checked for nail spacing at the edges, for nails driven too deep and for blocking behind the seams. Plates installed from the side are checked for the screws or bolts the maker lists. Anything short of the standard goes into the findings, and the scope covers only those gaps.
County permit and embers
Los Angeles County building and safety handles permits in unincorporated Altadena. Adding anchors or plywood to an earlier retrofit generally still needs a permit, and the county inspector sees the new work before it is covered. Should the lot appear on the state's fire hazard maps, any foundation vent we swap out can get fine metal mesh against embers. Engineering comes in when the earlier work included a beam, a footing or a steel frame and the check turns up a problem with it.
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Structural Work in Altadena: questions
Both, when the house has cripple walls under the floor. Bolts keep the sill on the foundation and plywood keeps those short walls from folding. Where an earlier retrofit added one and skipped the other, the gap is what the Altadena scope covers. A house with its sill directly on concrete needs only the bolts.
Adding bolts or plywood under the code's prescriptive retrofit rules needs no engineer, and we prepare those sheets. Fixing a beam, a footing or a steel frame left by an earlier job does, and a licensed engineer draws that. The county reviews both kinds.
Any sign of earlier work. Bolt heads along the sill, plywood on the cripple walls and steel plates at the foundation each tell us a retrofit was attempted. We then check how well it was done and whether the wood it fastens to is still sound.
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Describe the house and what it needs. We look at the structure first and send the quote in writing.