Prestressed Concrete HW 1c

The maximum jacking force should be limited to ___ of the specified tensile strength of the strand.

• 80%

• 50 percent

• 85 percent

Answer explanation

FIELD MANUAL 6.5.2

Elongation measurements should be to an accuracy of ___.

• 1/8 INCH

• 1/2"

• 3/8"

Answer explanation

FIELD MANUAL 7.2.3

The purpose of a lift off is to determine

• THE ACTUAL FORCE IN A TENDON

• if wedges are seated

• if tendons have pitted more than 0.002 inches of damage

Answer explanation

FIELD MANUAL 9.11

Stressing pockets should be filled with non-shrink grout within_____ after cutting Tendon tails & installing encapsulation cap.

• 1 DAY

• 48 hours

• immediately

Answer explanation

FIELD MANUAL 8.4

SPECIFICATIONS 3.12.2

Couplers when approved for use should be located ____________________.

• IN THE MIDDLE ONE-THIRD OF THE MEMBER

• best place possible to get to

• easily accessible

Answer explanation

FIELD MANAUL 9.10.3(a)

Calibrated jack-gauge systems shall be capable of measuring the jacking force within an accuracy of _____.

• 2 %

• 7 %

• 1 inch

Answer explanation

SPECIFICATIONS 3.10.4

Uniform Tendons should be supported at intervals not exceeding____.

• 4 FEET

• 47 inches

• 12 inches

Answer explanation

SPECIFICATION 3.7.1

Measured elongation shall agree with calculated elongation within ______.

• ⁺_- 7 %

• 3 inches

• 12 inches

Answer explanation

FIELD MANUAL 7.2.3

SPECIFICATIONS 3.10.5

Encapsulation caps shall be installed within _____ after cutting the Tendons tails.

• 8 HOURS

• 1 day

• immediately

Answer explanation

FIELD MANAUL 8.3

Acceptability of the stressing operation is determined by the combination of what two measurements ?

• GAUGE READING

  TENDON ELONGATION

• gauge reading and tape measurement

• tendon elongation and tape measurement

Answer explanation

FIELD MANUAL 7.1