door frame : wooden door frame made of hard wood /teak wood of section 145mm x 70mm with heat activated intumescent fire seal strip of section 10mm x 4mm and one coat of fire & anti-termite primer. door shutter : 55mm thick asbestos free composite fire / smoke check wooden shutters of 120 minutes fire resistance rating confirming to bs : 476 part – 22 & is : 3614 part -ii comprising of two 12mm thick calcium silicate boards sandwiching 25mm thick proprietory fire resistance insulation material faced with 3mm commercial ply on both side with heat activated intumecent fire seal strip of size 15mm x 4mm mounted on grooves on three sides except bottom and one coat of anti-termite fire retardent primer.
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