This week we feature the work of four Los Angeles based firms that I had the opportunity to interview on a recent trip to California. Alice Fung and Michael Blatt talk about their use of steel framing. Martin Fenlon tells us how he helps his clients be their own general contractor while Alice Kim and John Friedman speak about their philosophy and the problem with production built houses. Finally Zoltan Pali of SPFA:architects talks about sustainable architecture and his philosophy of design.