Tiêu chuẩn quốc tế
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Số hiệu
Standard Number
ASTM D4897-98
Năm ban hành 2001
Publication date
Tình trạng
W - Hết hiệu lực
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Tên tiếng Anh
Title in English Standard Specification for Asphalt-Coated Glass-Fiber Venting Base Sheet Used in Roofing
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Chỉ số phân loại Quốc tế (ICS)
By field |
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Số trang
Page 2
Giá:
Price Liên hệ / Contact us
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Phạm vi áp dụng
Scope of standard 1.1 This specification covers asphalt impregnated and coated glass fiber base sheet with fine mineral surfacing on the top side and coarse mineral granules on the bottom side for use as the first ply of a roofing membrane. These base sheets provide for the lateral release of pressure in roofing systems because they are not solidly attached and the coarse granular surface provides an open, porous channel in the horizontal plane beneath the membrane. The base sheets may be with or without perforations or embossings. 1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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