I.S. 20:1974废止
Concrete Building Blocks
出版：National Standards Authority of Ireland
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基本信息
标准编号： I.S. 20:1974
标准类别：Standard
出版单位：National Standards Authority of Ireland
标准页数：0
标准简介
Applicable to solid, hollow or cellular blocks, including aerated blocks designated according to their properties and gives the uses for which they are intended. Also gives requirements for dimensions, materials, surface, density, strength, drying shrinkage and wetting expansion. It covers special blocks. Provisions are included for sampling, certification and marking.
