Fordyce Ltd. to introduce you to distinguish fire doors and security doors: the only Shanghai and Chengdu have local standards of fire security door, the rest of the general can only be called fireproof entry door, fire door manufacturer, that both countries reach Fire Class A or B fire doors standard, fire doors wholesale price (infill fire door core) Class B standards are generally anti-burning time is divided. Welcome to the new and old customers call Fordyce Ltd., we will exhaust for you! Fordyce Ltd. to introduce you to the technical requirements of fire doors: Wooden fire door is flame retardant wood or wood products as frames, doors frame, panel doors, fire doors Which is good, if the filling material inside the doors, Jiangsu fire doors, the fill nontoxic to humans of fire insulation material, and with a door with a certain fire resistance of fire consisting of hardware accessories. Doors and door frames lap size not less than 12mm; doors and door frames have a gap with the hinge side activities shall not exceed the design drawings specified dimensional tolerances; doors and door frames have a lock on one side of the gap with the activity should not be greater than the design drawings specified dimensional tolerances; with the door leaf and the frame of the gap should not be greater than 3mm; double-leaf, the gap between multi-leaf door should not be greater than 3mm; doors and the lower frame or floor space activities should not exceed 9mm; doors and the bonding surface of the door frame clearance: doors and door frames have hinge side, there is a bonding surface on the lock side and frame clearance should not be greater than 3mm; doors and door frames of plane height difference: In the face of the fire door open, scalable Tianjin barcode reader plane doors and door frames should not exceed the height difference 1mm. Welcome to the new and old customers call Fordyce Ltd., we will exhaust for you! Jiangsu fire doors, Fordyce Trade and Industry sold worldwide, fire doors manufacturers to provide by Zhejiang Industry and Trade Co. Fordyce. Jiangsu fire doors, Fordyce Trade and Industry sold worldwide, fire door manufacturer Zhejiang Fordyce Ltd. (www.cngusite.com) this year introduced a new upgrade, the above picture is for reference only, please call or pictures on this page contact telephone number, to obtain the latest information, contact: Mr. Shen.