Steel weathertight (watertight) fire door
WxH is the clear size of opening for small doors, with a maximum size of 2,000x1,100 mm
W1xH1 is the hole size of small doors
W2xH2 is the clear size of opening for big doors, with a maximum size of 2,300x2,100 mm
W3xH3 is the overall dimensions of big doors
Marker Example:
The big doors have a clear opening size of 2,300 x 1,900 mm, door panel thickness of 10 mm, left opening, and the small doors have a clear opening size of 1,800x750 mm, door panel thickness of 8 mm, left opening, A60, watertight doors
Grade A60 single-leaf steel fire watertight door (with small door) 2,300x1,900-10-6.1/1,800x750-8-6.1
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