Roof structure with concrete ceiling has angular elements with horizontal arms on ceiling and secured by fixing means whilst outer vertical arms have fixing holes for inserting fixing screws

摘要

The concrete ceiling (12) has angular elements (22) mounted in the region of the rafters (14) with their horizontal arms (26) on the concrete ceiling and secured by fixing means (30) prior to casting the concrete ceiling. The outer vertical arms (28) have fixing holes whereby the supports stand up on the horizontal arms and are fixed on the vertical arms by fixing screws inserted through the holes.