Class A fireproof door can only reach 1.5h fire resistance time limit, and only the fireproof door made by special process can meet the 3-hour fire resistance requirement. The 3-hour fire door adopts the galvanized steel plate and stainless steel profile made by special process as the outer frame, which can be used as the window, but the window specification should not be too large.

ZHTdoors milango ya moto, miaka 31 ya uzoefu wa uzalishaji katika milango ya moto na Windows. Milango kuu ya moto ya UL, milango ya moto ya EN, milango ya moto ya BS EN, nk., Tuna certification.ZHTdoors msaada OEM na bure design.Our faida: ubora mzuri, bei ya kiwanda, huduma nzuri.Karibu kushauriana nasi.