12.07.2015 Views

FP-96 English Version - Eastern Federal Lands Highway Division

FP-96 English Version - Eastern Federal Lands Highway Division

FP-96 English Version - Eastern Federal Lands Highway Division

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Bolt LengthMeasured fromUnderside of Headto Endof BoltTable 555-7 (1)Nut Rotation from the Snug-Tight Condition (2)Geometry of Outer Faces of Bolted PartsBoth faces normalto bolt axisOne face normal tobolt axis and otherface sloped not morethan 1:20. (Bevelwasher not used)Section 555Both faces slopednot more than 1:20from normal tobolt axis. (Bevelwashers not used)Up to and including4 diameters 1/3 turn 1/2 turn 2/3 turnOver 4 diametersbut not exceeding 1/2 turn 2/3 turn 5/6 turn8 diametersOver 8 diametersbut not exceeding 2/3 turn 5/6 turn 1 turn12 diameters (3)(1) Applicable only to connections where all material within the grip of the bolt issteel.(2) Nut rotation is relative to bolt, regardless of the element (nut or bolt) being turned.The tolerance is ±30b for bolts installed by 1/2 turn or less. The tolerance is ±45b forbolts installed by 2/3 turn or more.(3) Determine the required rotation by actual tests in a suitable tension device simulatingthe actual conditions.(1) Rotational-capacity tests. Subject high-strength fasteners, black andgalvanized, to job-site rotational-capacity tests performed according toAASHTO M 164 Test Methods and the following:(a) After tightening to a snug-tight condition, as defined in (c)(3),tighten the fastener 2 times the required number of turns indicated inTable 555-7, in a Skidmore-Wilhelm Calibrator or equivalent tensionmeasuring device, without stripping or failure.443

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