Laserfiche WebLink
3. Insert the bolt into the bolt tension measuring device and install the required number of washers,and additional <br /> spacers as needed,directly beneath the nut to produce the thread stickout measured in Step 2 of this procedure. <br /> 4. Tighten the nut using a hand wrench to a snug-tight condition. The snug tension shall not be less than the <br /> Table A value but may exceed the Table A value by a maximum of 2 kips. <br /> Table A <br /> High-Strength Fastener Assembly Tension Values <br /> to Approximate§2u&-Tight Condition <br /> Bolt Diameter Snug Tension <br /> inches s <br /> 1/2 I <br /> 5/8 2 <br /> 3/4 3 <br /> 7/8 4 <br /> 1 5 <br /> 1 1/8 6 <br /> 1 1/4 7 <br /> 1 3/8 9 <br /> 1 1/2 10 <br /> 5. Match-mark the assembly by placing a heavy reference start line on the face plate of the bolt tension measuring <br /> device which aligns with 1)a mark placed on one comer of the nut,and 2)a radial line placed across the flat on <br /> the end of the bolt, or on the exposed portions of the threads of tension control bolts. Place an additional mark <br /> on the outside of the socket that overlays the mark on the nut corner such that this mark will be visible while <br /> turning the nut. Make an additional mark on the face plate,either 2/3 of a turn,one tum,or 1 1/3 turn clockwise <br /> from the heavy reference start line,depending on the bolt length being tested as shown in Table B. <br /> Table B <br /> Required Nut Rotation for Rotational Capacity <br /> ( <br /> Testsa,b) <br /> Bolt Length(measured Required Rotation(turn) <br /> in Ste 1 <br /> 4 bolt diameters or less 2/3 <br /> Greater than 4 bolt 1 <br /> diameters but no more <br /> than 8 bolt diameters <br /> Greater than 8 bolt 1 1/3 <br /> diameters,but no more <br /> than 12 bolt <br /> diameters(c) <br /> (a) Nut rotation is relative to bolt,regardless of the <br /> element(nut or bolt)being turned. For bolts <br /> installed by 1/2 tum and less,the tolerance shall be <br /> plus or minus 30 degrees; for bolts installed by <br /> 2/3 tum and more,the tolerance shall be plus or <br /> minus 45 degrees. <br /> (b) Applicable only to connections in which all <br /> material within grip of the bolt is steel. <br /> (c) When bolt length exceeds 12 diameters,the <br /> required rotation shall be determined by actual tests <br /> in a suitable tension device simulating the actual <br /> conditions. <br /> 6. Turn the nut to achieve the applicable minimum bolt tension value listed in Table C. After reaching this <br /> tension, record the moving torque, in foot-pounds, required to turn the nut, and also record the corresponding <br /> Contract No. 10-OM7104 <br /> 169 <br />