| 摘要 |
FIELD: construction. ^ SUBSTANCE: invention is related to construction, in particular, to manufacture of flitch girders. Method consists in adhesion of adjacent surfaces of metal core and wooden liners, drilling of through holes in wooden liners and metal core, insertion of tubular dowels in holes and their rolling. Through holes in metal core and in wooden liners are drilled simultaneously with different drills intended for metal and wood cutting with rotational speed different for metal and wood. Metal core and liners installed on above the other are placed and fixed on shifted tacking, being positioned relative to each other. Tacking is shifted during drilling operation by step equal to distance between neighbouring holes along girder length, after drilling liner placed on top is removed, surface of lower liner is treated with adhesive composition, core is shifted to lower liner, surface of core is treated with adhesive composition, the second liner is moved to core, previously assembled girder is turned by 90, and metal core and liners are fixed with tubular dowels against mutual displacement by means of tubular dowels rolling. ^ EFFECT: increased efficiency of flitch girders manufacture. ^ 2 cl, 25 dwg |
