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# Calculation formula for measured elongation of graded tension

calculation would result in measured elongations exceeding the 7 tolerance permitted by ACI between measured and calculated elongations For example with a tendon length of 15 ft an actual seating loss of 0125 in would result in a difference in measured and calculated elongation of 12 1221091 100 which exceeds the ACI tolerance

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### Reviewing Elongation Reports EVstudio

Aug 25 2017 At their most basic its possible to estimate the elongation of a tendon using the formula PLAE That is the elongation is equal to the product of the force P and the tendon length L divided by the area of the strand A and the tendon modulus of elasticity E

Jun 25 2018 Insert the values into the equation Elongation P L A E In the example multiple ten times five to get fifty and multiple 314 times twelve to get 3768 Divide fifty by 3768 and get an elongation of 133 inches

calculation would result in measured elongations exceeding the 7 tolerance permitted by ACI between measured and calculated elongations For example with a tendon length of 15 ft an actual seating loss of 0125 in would result in a difference in measured and calculated elongation of 12 1221091 100 which exceeds the ACI tolerance

Technical Note 16 PostTensioning

Jun 01 2011 The PT guys have two ways to measure cable tension 1 direct measurement of force and 2 elongation The EOR normally specifies the initial tension required and leaves the measurement to the technicians in the field They keep thorough notes showing both the gauge reading and the elongation

### Elongation at Break or Fracture Strain Technical

Elongation at Break also known as fracture strain or tensile elongation at break is the ratio between increased length and initial length after breakage of the tested specimen at a controlled temperature It is related to the ability of a plastic specimen to resist changes of shape without cracking

Sep 25 2013 23 Calculation of Mechanical Properties The forcedisplacement responses were replotted in terms of engineering stress and strain to calculate E y max max and U el max Using the measured dimensions of the samples and Eqn 1 2 and 3 the Youngs modulus E was calculated The yield stress y was

length can be off by 1 and not make a significant difference in elongation calculations For example if the theoretical elongation for a 300 foot long frame is 24 inches then a 1 or 3 foot discrepancy in computing the tendon length results in only a 024 or inch difference in elongation C

Rod Elongation Calculator Rod elongation is a critical consideration in the design of threaded rod systems carrying uplift loads from roof to wall anchorage or shearwall overturning This quick easy calculator assists the designer in determining elongation given a demand load and rod properties

Rod Elongation Calculator Simpson StrongTie Site

### Measuring the Ductility of Metals

The occurrence of necking in a tension test makes it impossible to convert an Elongation measurement to a Reduction of Area measurement While they usually vary in the same way as a function of test temperature or alloy content for example it is not always the case Elongation and Reduction of Area measure different types of material behavior

Bolt elongation is directly proportional to axial stress when the applied stress is within the elastic range of the material If both ends of a bolt are accessible a micrometer measurement of bolt length made before and after the application of tension will ensure the required axial stress is applied

Aug 25 2017 ACI 31811 section 18201 states Prestressing force shall be determined by both of a and b a Measurement of steel elongation Required elongation shall be determined from average loadelongation curves for the prestressing steel used b Observation of jacking force on a calibrated gage or load cell or by use of a calibrated dynamometer

Jun 25 2018 The bars length would be labelled as L in the formula Always use the same units when solving the elongation For example dont use metrics for force and English units for length Calculate Area Next calculate the crosssectional area of the bar Measure the diameter of the bar and divide it by two to get the radius

### Elongation Tolerance for Short Tendons in Post

REASON FOR ELONGATION DISCREPANCY Uncertainty in calculated elongation In this subsection the uncertainty that exists in calculating elongations is investigated Elongations measured at the jacking end are calculated using Eq 1 and 2 Note that Eq 1 is taken from Section 442 of ACI 42310R16 TT xo e p kx 1

Elongation Tolerance for Short Tendons in Post

Jun 01 2011 The PT guys have two ways to measure cable tension 1 direct measurement of force and 2 elongation The EOR normally specifies the initial tension required and leaves the measurement to the technicians in the field They keep thorough notes showing both the gauge reading and the elongation

3 The source from which the formula for elongation is derived In this video the solution is given to the following problem Problem Find out the length of a mild steel rod after providing 100 kips forceload Suppose the diameter and length of rod are and 36 inches The following formula is used to provide the solution Elongation

retical elongation for a 400footlong strand after initial tension of 3000 pounds is 30 inches For a 55 tolerance the measured elongation should be between 281 2 and 311 2 inches After an initial pull of 3000 pounds the final jacking force read on the gauge is 25500 pounds Measured elongation is 305 8 inches This value

### Technical Note 16 PostTensioning

calculation would result in measured elongations exceeding the 7 tolerance permitted by ACI between measured and calculated elongations For example with a tendon length of 15 ft an actual seating loss of 0125 in would result in a difference in measured and calculated elongation of 12 1221091 100 which exceeds the ACI tolerance

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