LOS ANGELES — Apartment and condo builders in some parts of Los Angeles may have to use fire-resistant materials if a nascent movement takes hold. Opponents have said such new rules would lead to much higher construction costs. Supporters dispute that and say the real impetus is to create a safer, more fire-resistant city. At issue is an ordinance proposed in June 2019… titled “Building a Safer Los Angeles,” it would expand what’s called Fire District 1 and require that multifamily homes within that district be built with noncombustible materials. The ordinance was approved in June by the council’s Public Safety Committee and will go to the Planning and Land Use Committee. …The measure proposes that the city council expand this protected zone to include all areas within the city covered by the California Department of Forestry and Fire Protection’s very high fire-severity zone. …Building with wood would be severely curtailed in the new district.