S.I. No. 391/1953 - Standard Specification (Bitumen Damp-Proof Courses) Order, 1953.

S.I. No. 391 of 1953.

STANDARD SPECIFICATION (BITUMEN DAMP-PROOF COURSES) ORDER, 1953.

I, SEAN F. LEMASS, Minister for Industry and Commerce, in exercise of the power conferred on me by subsection (3) of section 20 of the Industrial Research and Standards Act, 1946 (No. 25 of 1946), hereby order as follows :

1. This Order may be cited as the Standard Specification (Bitumen Damp-proof Courses) Order, 1953.

2.—(1) The specification set forth in the Schedule to this Order is hereby declared to be the standard specification for Bitumen Damp-proof Courses.

(2) The said standard specification may be cited as Irish Standard 57 : 1953 or I.S. 57 : 1953.

SCHEDULE

SCOPE

1. This specification covers bitumen damp-proof courses of the following types :—

Type A Hessian base

Type B Fibre felt base

Type C Asbestos base

BASE

2. The base used in manufacture shall be for Type A Hessian base, a single layer of plain woven jute cloth weighing not less than 6 oz. per square yard.

for Type B Fibre felt base, an absorbent sheet of felt made from animal or vegetable fibres or a mixture of these fibres, weighing not less than 14 oz. per square yard.

for Type C Asbestos base, an absorbent sheet of asbestos fibre containing not less than 80 per cent. of asbestos and weighing not less than 18 oz. per square yard.

SATURATING MATERIAL

3. The material used for saturating shall consist of bitumen having a penetration at 25°C./100g./5 sec. of not less than 100 and not more than 200 units of 0·10 mm. The penetration shall be determined by the method I.P.—49/46 given in the Standard Methods of Testing Petroleum and its Products, 9th Edition, 1948, published by the Institute of Petroleum, Mansion House, 26 Portland Place, London. W.I

COATING MATERIAL

4. The material used for coating shall consist of asphaltic bitumen or lake asphalt, suitably fluxed, or a mixture of these materials, with added mineral where it is necessary to stabilise the asphaltic bitumen and reduce the risk of extrusion. The material shall have a softening point when determined by the ring and ball test of not less than 70°C. and not more than 93°C. The softening point shall be determined by the method I.P.—58/46 given in the Standard Methods of Testing Petroleum and its Products, 9th Edition, 1948, published by the Institute of Petroleum, Mansion House, 26 Portland Place, London, W.1.

SURFACING MATERIAL

5. The surfacing material shall consist of finely divided talc or other suitable material.

CONSTRUCTION

6. Each type of bitumen damp-proof course shall consist of the appropriate base, thoroughly impregnated with the saturating material, coated on both faces with the coating material and dressed on both faces with the surfacing material.

WEIGHTS OF CONSTITUENT MATERIALS

7. The weights of saturating, coating and surfacing materials for each type of bitumen damp-proof course shall be not less than the weights given for the type in the following Table.

FINISHED WEIGHT

8. The weight of bitumen damp-proof courses, exclusive of surfacing material and packing, shall be not less than 7 lb. per square yard.

PACKING

9. Bitumen damp-proof courses shall be packed in rolls of not less than 8 yards in length and of widths varying from 4½ inches to 36 inches suitable for various wall thicknesses.

MARKING

10. Each roll shall be marked to indicate the type of damp-proof course, the length and width of the roll and the manufacturer's name or mark.

GIVEN under my Official Seal this 14th day of December, 1953.

SEAN F. LEMASS,

Minister for Industry and Commerce.