Global Warming

( Reaffirmed 2003 )

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Indian Standard
HIGH STRENGTH BOLTS IN STEEL STRUCTURES - CODE OF PRACTICE

( First Revision )

UDC

631-882-2 : 624-014-2-078-2

@ BIS 1992

BUREAU
MANAK

OF
BHAVAN, 9

INDIAN
BAHADUR NEW DELHI

STANDARDS
SHAH 110002 Price Groop 6 ZAFAR MARG

January 1992

Structural

Engineering

Sectional

Committee,

CED 7

FOREWORD This Indian Standard ( First Revision ) was adopted by the Bureau the draft finalized by the Structural Engineering Sectional Committee Civil Engineering Division Council. of Indian Standards, after had been approved by the

Use of high strength bolts in structural connections is fast gaining popularity over the conventional bolted connections. These structural connections which could be either bearing type or friction type have rigidity or continuity comparable with what is achievable in welded construction. The strength of the joint fabricated by means of these bolts is obtained by bearing or friction ( grip ) developed as a result of very high initial tension in the bolts produced by tightening the nuts to the specified bolt tension. This standard was first published have been effected: in 1967. In this revision following important modifications

i) Bolts of property class 8.8 and 19.9 as covered in IS 3757 : 1958 ‘High strength structural bolts ( second revision )’ have been specified. ii) In addition to friction type joints, joints subjected to tensile force only in the direction of the bolt axis and bearing type joints have been covered. iii) In the method of tightening of bolts, the ‘torque control method’ has been replaced by use of ‘direct tension indication device’. iv) Fabrication and assembling provisions have been elaborated. v) A method for the determination of slip factor for the different surface conditions has been inclubed. In the preparation of this code, SAA High Strength Structural (SAA). considerable assistance Bolting Code’, issued has...