The Calibrated Wrench is used in the Applied Bolting Method.
After all steel plies in a connection have been drawn into firm contact, Calibrated Wrench can only be performed.It was snug-tightened.Failure to do so will result in inadequate bolt pretension and loose connections.The Calibrated Wrench pretensioning method uses the exact configuration of installation tools and power supplies under as nearly identical conditions as possible as actual installation conditions, within one day or less.The sample consists of production lot combination of each assembly, individual component state, jobsite environment, and time removed from protective storage.The use of formulas or charts with specific values is not allowed.It's not acceptable to count seconds, particular sounds, or lack of them while tightening.The most expensive way to pretension bolts is by using a wrench.Torque testing will be constant since all test results apply to a specific tool, a single unique bolt assembly, fully pretensioned on the day of testing.Torque charts and equations are not allowed by the RCSC/AISC specification.The Pre-Installation verification procedures specified in Section 7 will be performed daily for the calibration of the installation wrench.Torque values from tables or equations will not be used.The phrase "without verification" means that a tension calibrator must be used.Since DuraSquirt® DTIs are bolt tension measurement devices, an alternative to nonstop testing is possible.Regardless of tool, Torque applied or bolt condition, DuraSquirt® DTIs provide verification.Enough Torque has been applied to A DuraSquirt®.It's not necessary to determine an actual Torque value.The DTI should be pretensioned if it is fully Squirts.A full description of this procedure can be found in the link below.The bolt and nut threads have different finishes and tolerances.The degree of lubrication changes.Dust and dirt can be contributed to by the shop or job site conditions.The supporting surface and the nut face of the bolt head have differing levels of friction.The parts of the assembly are re-lubricated.There are differences in the surface condition of bolts, nuts and washers.When the following factors are encountered, collect every permutation of items 1 through 7 daily and add additional 3 complete sample assembly and tests.Within a work shift, the condition, lubrication and power supply for the Torque wrench may change.Any wrench that senses or responds to the level of applied Torque has the repeatability of its performance.The wrench's major components include lubrication, hose and air supply.There is a combination of tools and supply.For each permutation of items 8 through 12.The Pre-Installation Verification procedure is described in section 7 of the Research Council on Structural Connection's (RCSC) Specification for Structural Joints Using High Strength Bolts.The minimum required bolt pretension is listed in table 7.1.Average the 3 values and record the Torque required to achieve step 1 above.The steel plies of the connection have been tested.If conditions are not similar to those observed during testing or repeat steps 1 through 3, apply recorded Torque to the representatives defined by the sample group within a reasonable time.The unturned element must be restrained from rotating.For every installation component, repeat number 1 - 4.They will be doing the bolting operations on the first day.If applicable, disregard all Torque values calculated from the previous Day of Fastener Sampling.This is a description of the first day of fastener sampling.This is a description of the first day of testing and bolting operations.Step 1 is followed by a series of instructions.Day 2 and every day thereafter.Observe that all sampling and testing has been done.Only the exact equipment used during testing can be used to confirm specific Torque results.Installation personnel must watch as they apply the preset Torque to the bolts in the steelwork.The use of any type of wrench is not allowed.There is no need for further evidence of conformity.All affected hardware must be re-tested if time elapsed between unpacking, sampling, testing, snugging and pretensioning to be minimal.Bolts that are installed but not fully pretensioned must be separated from the work within a reasonable time.If the pretension is greater than the required value, it will not be cause for rejection.Any project that references the Canadian Institute of Steel Construction's handbook of steel construction is not allowed.
After all steel plies in a connection have been drawn into firm contact, Calibrated Wrench can only be performed.It was snug-tightened.Failure to do so will result in inadequate bolt pretension and loose connections.
The Calibrated Wrench pretensioning method uses the exact configuration of installation tools and power supplies under as nearly identical conditions as possible as actual installation conditions, within one day or less.The sample consists of production lot combination of each assembly, individual component state, jobsite environment, and time removed from protective storage.The use of formulas or charts with specific values is not allowed.It's not acceptable to count seconds, particular sounds, or lack of them while tightening.
The most expensive way to pretension bolts is by using a wrench.Torque testing will be constant since all test results apply to a specific tool, a single unique bolt assembly, fully pretensioned on the day of testing.Torque charts and equations are not allowed by the RCSC/AISC specification.
RCSC/AISC 8.2.2.The Pre-Installation verification procedures specified in Section 7 will be performed daily for the calibration of the installation wrench.Torque values from tables or equations will not be used.
The phrase "without verification" means that a tension calibrator must be used.Since DuraSquirt® DTIs are bolt tension measurement devices, an alternative to nonstop testing is possible.
Regardless of tool, Torque applied or bolt condition, DuraSquirt® DTIs provide verification.Enough Torque has been applied to A DuraSquirt®.It's not necessary to determine an actual Torque value.The DTI should be pretensioned if it is fully Squirts.
Follow the link below for a full description of the procedure.
When: collect 3 samples of all complete fastener assembly based on each combination of diameter, grade, length and production LOT.
When the following factors are encountered, collect every permutation of items 1 through 7 daily.
All sampling and testing has been done.Only the exact equipment used during testing can be used to confirm specific Torque results.
Installation personnel must watch as they apply the preset Torque to the bolts in the steelwork.The use of any type of wrench is not allowed.
All affected hardware must be re-tested if time elapsed between unpacking, sampling, testing, snugging and pretensioning to be minimal.Bolts that are installed but not fully pretensioned must be separated from the work within a reasonable time.The pretension that is greater than the required value is not cause for rejection.