| 摘要 |
A DOOR IS CONSTRUCTED WITH A SEPARATE MEMBER JOINED TO THE DOOR EDGE BY A TONGUE-AND-GROOVE COUPLING AND SCREWS SO AS TO BE READILY REMOVABLE AND REPLACEABLE. THE SEPARATE MEMBER SUSTAINS THE IMPACTS IMPARTED TO THE DOOR BY CARTS OR WAGONS PUSHED PAST THE DOOR AND CAN BE READILY REPLACED WHEN DAMAGED, THUS AVOIDING REPLACEMENT OF THE ENTIRE DOOR. A FLEXIBLE COVER SNAPS OVER THE OUTER SURFACE OF THE SEPARATE MEMBER TO ADD IMPACT RESISTANCE AND AESTHETIC APPEAL. INTUMESCENT STRIPS MAY BE INSERTED INSIDE OR OUTSIDE OF THE COVER TO ENHANCE SEALING BETWEEN THE DOOR, AND AT THE ADJACENT DOOR OR DOOR FRAME, THEREBY IMPROVING THE FIRE RESISTANCE RATING OF THE DOOR. ACCENT STRIPS OR REVEALS OF CONTRASTING OR COMPLEMENTARY COLORS MAY BE INCORPORATED TO ADD TO THE AESTHETIC APPEAL OF THE DOOR. THE DOOR CONSTRUCTION IS OF PARTICULAR UTILITY IN SCHOOLS, HEALTH CARE FACILITIES AND OTHER INSTITUTIONS. |
