Heavy Works for Roof Construction

رقم المستند: NL 63 : 1999
القطاع: Construction Materials and Building
TC: NL TC FP
ICS:
1- The superposition or juxtaposition of heavy aggregate concretes (or mortars) and light or very light aggregate concretes (or mortars) in a single form is not permitted. 2- The use of a mineral-based concrete fall form is permitted only if a waterproof support is set in independently. 3- If there is underfloor heating, fall forms made from light or very light concrete must not be used. This system is no longer allowed if a high degree of thermal insulation is required (freezer rooms or electrically heated areas). 5- The use of light or very light aggregate for pre-fabricated segmented fall forms laid on insulating panels is forbidden. 6- As these forms are likely to retain a large amount of the water used during construction, or rainwater, before waterproof cladding is provided, it is essential to take all possible precautions to drain them .