IPIQ

FIXED CONSTRUCTIONS

E04

BUILDING

E04D

ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS

3/00

Roof covering by making use of flat or curved slabs or stiff sheets

E04D3/24

with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like