MODIFICATION METHOD AND MODIFICATION METAL FITTING FOR EXISTING ROOF PITCH

摘要

PURPOSE:To execute work easily and in a short period to provide efficient high productivity. CONSTITUTION:First U-shaped channels 1 in which multiple holes are provided on both sides opposedly at specified intervals are fixed over an existing roof with their recesses faced upward. Also second U-shaped channels 2 in which multiple holes are provided on both sides opposedly at specified intervals are fixed over the first U-shaped channel with their recesses faced downward. The positions of these channels are selected appropriately, and the screws of multiple U-shaped pitch adjusting metal fittings 3 of which both ends are engraved are inserted into the holes and fixed. Thus the pitch of the second U-shaped channel can be changed.