Roof panels held by hooks on strips - have hollow edge rib sides bent as counter-hooks for bent loop shackles

摘要

Panels with hollow edge profile ribs overlapping, and intervening correspondingly shaped retainer ribs, make up the covering on a roof, together with transverse strip-shaped holders on the supports, with end hooked loop shackles and snap loop shackles. On each holder the hooked shackle is bent back to form the hook. The open edge of the overlapped hollow profile rib working in conjunction with this is bent up towards the rib interior, to form an upward-open counterhook, and the hook can be swung in to engage this only from the bottom. Ribs can be supported against each other to enhance rigidity of the roof covering, without sacrifice of ease of installation.