Inquiry (采购产品): fire doors I am currently working on a TI for a biochemical lab expansion in Brea CA. We are seeking information on a fire rated door with or without auto closing. The wall we are considering for a passthrough is 4 hour rated (tiltup concrete). **** Hidden Message ***** Frank Vanesky, P.E. 92081 Company: Frank Vanesky Engineering E-mail: fjvanesky@worldnet.att.net **** Hidden Message ***** fjvanesky@worldnet.att.net
