roof covering

1. All the materials laid on the roof frame; includes sheathing, the outer cladding materials, asphalt paper, etc. 2. A roof covering, 1 which is not readily flammable and does not slip from position. The following classes have these and additional properties: Class A is effective against severe fire exposure, does not carry or communicate fire, and affords a fairly high degree of fire protection to the roof-deck. Class B is effective against moderate fire exposure, does not readily carry or communicate fire, and affords a moderate degree of fire protection to the roof-deck. Class C is effective against light fire exposure, does not readily carry or communicate fire, and affords a slight degree of fire protection to the roof-deck.

单词	roof covering
释义	roof covering roof covering 1. All the materials laid on the roof frame; includes sheathing, the outer cladding materials, asphalt paper, etc. 2. A roof covering, 1 which is not readily flammable and does not slip from position. The following classes have these and additional properties: Class A is effective against severe fire exposure, does not carry or communicate fire, and affords a fairly high degree of fire protection to the roof-deck. Class B is effective against moderate fire exposure, does not readily carry or communicate fire, and affords a moderate degree of fire protection to the roof-deck. Class C is effective against light fire exposure, does not readily carry or communicate fire, and affords a slight degree of fire protection to the roof-deck.
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