Structural strapping and bracing similar to what’s recommended in high-wind areas also helps to make homes more earthquake resistant. In high-risk earthquake areas, foundations should be designed by structural engineers and homes should include hold-down straps to keep walls from shifting. Water heaters and other mechanical equipment must be attached to structural members. All glazing should be tempered glass or have an interior safety film. Gas and propane lines should have flexible connectors and automatic shut off valves. Masonry chimneys should be carefully connected to structural members and should not extend more than 24 inches above the roofline. Simple house shapes perform the best.