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Reg. 90
MATERIALS OF CONSTRUCTION

GENERAL GREY IRON CASTINGS (GRADE A)

Transverse test

A transverse test bar cast in accordance with Regulation 88(a) must when placed on supports set at the distance shown in column 2 of the following table sustain a load applied at the centre of not less than that shown in column 3 and must show before rupture a deflection not less than that shown in column 4. The supports and the point of application of the load shall be rounded to a radius of not less than 1/8 inch.

Diameter of test bar 
(1)
Distance between Support 
(2)
Minimum breaking load – Grade A 
(3)
Minimum deflection – Grade A 
(4)
Inches Inches lbs.
Inch

0.6 9 530 0.07
0.875 12 1,185 0.10
1.2 18 1,950 0.15
1.6 18 4,280 0.12
2.1 24 6,660 0.15

If the diameter of a transverse test bar as cast varies within the limits specified in Regulation 88(a) the equivalent breaking load for the test bar of standard diameter shall be calculated in accordance with the given factors in Appendix F.

 
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Message from Chairman of Central Boilers Board About Central Boiler Board History of Indian Boiler Regulations Foreword Contents Chapter Wise Contents Regulation Wise List of Amendments
Indian Boilers Act 1923 Ibr Forms Home Search Help Contact Us