出典:Wikipedia
出典:『Wikipedia』 (2010/06/20 09:19 UTC 版)
Cross brace is the cross-beam connecting the next arches for giving of rigidity at construction of minings and tunnels, more often tubular round diameter (as a rule, it is made of scraps of pipes), on the ends with clips or apertures for screw fastening; serves as an element stiffening and stability of a design. There are also other forms; at times, this word name ordinary cross-section wooden cross-beam, or even a board.