Precast concrete products. Wall elements Ingestion-build-143074 introducing the following principal changes:

introducing the following principal changes:

Clause 13 deals with radiation conditions to be used for studies in mammography under narrow beam condition

BS EN 622-1 on general requirements for fibreboards is useful for:

are not given in BS EN 15663

This British Standard specifies the general requirements for aerospace bolts and free running nuts of tensile strength not exceeding 1 249 MPa

Precast concrete products. Wall elements Ingestion-build-143074 introducing the following principal changes:1 Scope This European Standard applies to prefabricated walls, made of normal weight or lightweight concrete with dense structure. Also fibre reinforced concrete (steel, polymer or other fibres covered by European Standards) may be used. These wall elements may have external wall functions (see 3. 11) or not, have facing functions (see 3. 12) or not or have a combination of these functions. External wall functions could be: thermal insulation (see 3.