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Several manufacturers offer NFPA 1931 compliant fiberglass fire ladders. When used with a suitable resin, fiberglass has significantly better resistance to heat
by jdietrich 8y ago
Several manufacturers offer NFPA 1931 compliant fiberglass fire ladders. When used with a suitable resin, fiberglass has significantly better resistance to heat and flame. Fiberglass and wood are both prone to sudden failure due to crack propagation, but in both cases that risk is mitigated by regular inspection.
- reaperducer 8y agoWhen used with a suitable resin, fiberglass has significantly better resistance to heat and flame. And how's the price compared with wood?
- dsfyu404ed 8y agoI can't imagine it's not better than wood ladders made in a low volume specialty shop in SF
- gamblor956 8y agoYou'd be completely wrong. They have access to a lot of wood up there, the space to store that wood, and the time to dry it completely. The actual woodworking itself takes a small fraction of the time, and the overall cost of a wood ladder built this way is under $1000. In contrast, a high-heat-tolerant resin is expensive. The amount of such resin needed for a table-sized ladder would cost in the hundreds; for a 50 foot ladder, the resin alone would cost in the thousands--and that does not include the cost of other materials, or the cost of actually making, test, or shipping the ladder.