Insulated Door
Insulated Door :
Insulated doors can typically be either of timber construction, generally up to 60 minutes fire resistance, or of a timber faced, and possibly lipped, mineral cored and/or framed construction, or be of an insulated steel faced flush door or a metal framed stile and rail construction incorporating insulating glass. The performance of an insulated door is evaluated via the procedures of clause 6 of BS 476: part 22
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