DT2113 Tension and Rotational Capacity Test Record.doc

tension and rotational capacity test recordwisconsin department of transportationdt2113 11/2006this form should be completed and filed with the as-built construction as a permanent record. one worksheet shall be completed for each rotational capacity lot number used on the project. a lot shall consist of any possible combination of nut and bolt to be used in the intended structure.regioncontract numberjob numberprojectbolt grade a325 a490assigned r-c lot numberboltnutwashermanufacturerlot numberdiameter incheslength inchestension test sample 1sample 2sample 3minimum measured tension (see table 1 below) kips kips kipsmeasured torque at required tension ft/lbs ft/lbs ft/lbs(sample 1 + 2 + 3 torque) / 3 = testing torque ft/lbsrotational capacity test(after twice the installation rotation)sample 1sample 2minimum measured tension * (see table 2 below) kips kipsmeasured tension * kips kipsmeasured tension is above minimum allowable pass fail pass failmeasured torque ft/lbs ft/lbsmaximum permitted torque (see table 3 next page) ft/lbs ft/lbsmeasured torque less than maximum pass fail pass failverify thread condition pass fail pass fail* applies only to the long bolt test; leave blank for the short bolt testtable 1. minimum measured tension (kips)bolt dia.3/4 inch7/8 inch1 inch1 1/8 inch1 1/4 inch1 3/8 inch1 1/2 incha325283951567185103a49035496480102121148table 2. measured tension (kips)(after twice the installation rotation)bolt dia.3/4 inch7/8 inch1 inch1 1/8 inch1 1/4 inch1 3/8 inch1 1/2 incha325324559648298118a4904056749211724170tested bywitnessed bylocationdatetable 3. rotational capacity maximum torque3/4 inch7/8 inchtension (kips)torque (ft/lbs)tension (kips)torque (ft/lbs)284373971129453407293046941747314844276632500437843351644802345314582035547468393656247857375784887538594498933960950911406255193041641529484265653966436725498444688551003457035610214671957103947734581057487505910764976660109450781611112maximum permitted torque for sizes use621148t = 0.25 pd641185p = tension (pounds)621148d = bolt diameter (feet)6411670.25(d)/12p = max torque651185tension and rotational capacity test instructionsstep 1 - tension testperform a load cell test on each of three sets (bolt, washer, and nut), finding the torque of each set. then average the three to get the inspection torque. torque values may not be used as installation torques. bolts need to be tightened using turn-of-the-nut method or load-indicating washer tensioning methods only. step 2 rotational capacity test+ record the minimum measured tension from table 2.+ turn the nut twice the rotation required in the tension test.+ record the tension (measured tension) and compare to the minimum measured tension.+ if it is above the minimum, it passes; check the pass box; if not, check fail.+ record the torque value at 2x rotation.+ record the maximum permitted torque from table 3.+ if measured torque is less than the maximum torque, it passes; check the pass box; if not, check fail. high torques may be cause for change in condition of the lot.+ verify that the nut can be freely turned (by hand) to the index it was during the test.+ perform the test on a second set (bolt, washer, and nut). + if both sets pass, the