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For impact resistance UL 2218 Class 4 is best. This increases survivability from hailstorms, but the shingles become more susceptible to hail damage with age. [9] Fire resistance: Forest fires and other exterior fires risk roofs catching on fire. Fiberglass shingles have a better, class A, flame spread rating based on UL 790, and ASTM E 108 ...
An asphalt shingle roof has flexible asphalt shingles as the ridge cap. Some roof shingles are non-combustible or have a better fire rating than others which influence their use, some building codes do not allow the use of shingles with less than a class-A fire rating to be used on some types of buildings. Due to increased fire hazard, wood ...
Nepal Building Codes (NBC) are a set of a technical documents developed by The Department of Urban Development and Building Construction under the Ministry of Physical Planning and Works of Nepal. The codes were first drafted in 1993–1994 and were adopted in 2003. It was included in the gazette in 2006. Adherence to the NBC is mandatory in ...
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A heavier class of materials with a similar construction but designed for civil engineering, environmental protection, and mining applications are known as Bituminous Geomembranes (BGMs). BGMs are distinguished in part by larger roll widths which can exceed 5m and substantial thickness of up to 6.0mm. [3]
25.4% of Nepal's land area, or about 36,360 km 2 (14,039 sq mi) is covered with forest according to FAO figures from 2005. FAO estimates that around 9.6% of Nepal's forest cover consists of primary forest which is relatively intact. About 12.1% Nepal's forest is classified as protected while about 21.4% is conserved according to FAO.
By subscribing to the basic principles of the International Rural Reconstruction Movement, GRITS-Nepal was renamed and officially registered in 1993 as Rural Reconstruction Nepal (RRN). With the passage of time, RRN has been able to expand itself into one of the fast-growing NGOs in the country together with its diverse development programmes ...
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