It is my practice to surface fasten light fixtures (i.e. flouescent strips) in ceilings using steel drop in anchors. The reasoning being that in a fire the anchors will hold up and the fixtures will not fall on the firefighters.
I was curious if lead anchors or plastic anchors (in a light weight light) can be used or if there is some code on this.
Lead has a relitively low melting point, it may be on of the first things to fail in a fire. In dropped cielings I just get the cieling installer to shoot my support wires to the lid. Regular cieling, if I had not already cast in the light or support into the pour, Tap con, and if it's heavy, a lttle epoxy too. If its really heavy I break out the Hilti catolog for the under-cut anchors, and some epoxy... http://www.us.hilti.com/holus/modules/prcat/prca_navigation.jsp?OID=-11561
Mark Heller "Well - I oughta....." -Jackie Gleason
#69365 - 09/08/0607:23 AMRe: Mounting lights on concrete ceilings