| 摘要 |
FIELD: construction. ^ SUBSTANCE: girth rail for fireproof door is suggested. Girth rail contains a guide, spring arranged between the girth rail and support, and fuse link. Girth rail is made hollow; the guide is accommodated inside the girth rail and with one end of the support. The second end of the guide has a head. Fuse link is placed between the head and the girth rail. ^ EFFECT: creation of a simple, technologic construction of the girth rail having high operational reliability. ^ 4 cl, 2 dwg |
