who said anything about safety glass? tmk, there aren't any code regs for safety glass in construction.
auto front windows are safety glass, but the 2 pieces of glass that make it up are not tempered. if they were tempered, there's be a lot more crushed heads and it wouldn't have to be safety glass. the plastic is there to hold the shards together. you want the glass to break, but not splinter or leave a hole for a head to go through.
all other auto windows are tempered, but not safety, glass.