ICC Prestressed Concrete Q & A
Module 1. Prestressed concrete is: - Correct Answer - - The tensioning of steel-stranded cables
prior to concrete placement
- The tensioning of steel-stranded cables after concrete has been placed and hardened
- Concrete that has received a tensile load prior to any service loads
Module 1. The use of a prestressed concrete system will achieve the following: - Correct Answer
- - Reduced thickness of concrete, less conventional reinforcing steel and adequate crack
control
Module 1. Once tensioned, the tensioning cables are held securely in a tensioned state by: -
Correct Answer - Wedges that have been seated
Module 1. The end of a cable that terminates within a concrete slab, thus rendering it in
accessible from outside the concrete is known as: - Correct Answer - The dead end
Module 1. The presence of sheathing on a wire-stranded cable indicates that: - Correct Answer
- It will be used in an unbonded system application
Module 1. The most common post-tension cable tendons in use today are made up of: - Correct
Answer - 7 steel strands of wire wrapped together
Module 1. In an unbonded system, the force applied to the concrete after tensioning: - Correct
Answer - Comes from the anchorage zone only
Module 2. Post-tension manufacturing plants must be certified by: - Correct Answer - PTI
Unbonded Plant Certification Program
Module 2. Prior to cutting the tendon tails after tensioning, the field records of stressing activities
must be forwarded to and approved by: - Correct Answer - The engineer of record
Module 2. In the event that a new set of stressing equipment is delivered to the project, this
equipment should contain __________ for review prior being used on-site: - Correct Answer - A
current calibration chart relating gauge pressure to force applied
Module 2. According to the Field Procedures Manual for Unbonded Single Strand Tendons, all
of the following items are necessary for post-tension document control except:
A) Concrete Strength Results
B) Shipping Lists
C) Material Certifications
D) Approved Installation Drawings - Correct Answer - A) Concrete Strength Results
, Module 2. When reporting stressing results, the following information is necessary to record:
A) Jack and gauge serial number
B) Elongation measurements and percentage deviation
C) Both A and B
D) Gauge Manufacturer
E) All three, A, B, and D - Correct Answer - C) Both A and B
Module 2. When moving post-tension cables across the site, the use of _______ is permitted.
A) Nylon slings, with unloading as close as placement as possible
B) Smooth finished chains with limited use
C) Epoxy coated high strength wire with limited use
D) A large front loader exercising caution - Correct Answer - Nylon slings, with unloading as
close to the placement as possible
Module 2. When storing post-tension cables, care must be taken to: - Correct Answer - Prevent
the cables from being exposed to weather elements and moisture
Module 2. During deliver, it is the ______________ responsibility to ensure the delivered items
match the shipping list. - Correct Answer - Buyer's
Module 2. According to the Field Procedures Manual for Unbonded Single Strand Tendons, the
follow documents must be kept on site: - Correct Answer - 1) Approved Installation Drawings
2) Shipping Lists
3) Material Certifications
4) Jack Calibrations
5) Stressing Records
Module 2. Install drawings show: - Correct Answer - Plan views, elevation views, and details so
the subcontractor and inspector can clearly see the tendon layout. This includes tendon profiles,
also known as drape.
Module 2. Drape - Correct Answer - Tendon profiles
Module 2. Material Certifications - Correct Answer - Documents that describe the cables'
physical properties and factory testing results.
Module 2. Stressing records, written by the inspector, should include: - Correct Answer - -
Location of tendons stressed (grid line to grid line)
- Type of tendons stressed (banded, uniform, beans, temperature)
- Gauge/jack used
- Date, time, and weather during stressing
- Stressing crew
- Elongations based on a traceable numbering system
- Any deviations from tolerances
Module 1. Prestressed concrete is: - Correct Answer - - The tensioning of steel-stranded cables
prior to concrete placement
- The tensioning of steel-stranded cables after concrete has been placed and hardened
- Concrete that has received a tensile load prior to any service loads
Module 1. The use of a prestressed concrete system will achieve the following: - Correct Answer
- - Reduced thickness of concrete, less conventional reinforcing steel and adequate crack
control
Module 1. Once tensioned, the tensioning cables are held securely in a tensioned state by: -
Correct Answer - Wedges that have been seated
Module 1. The end of a cable that terminates within a concrete slab, thus rendering it in
accessible from outside the concrete is known as: - Correct Answer - The dead end
Module 1. The presence of sheathing on a wire-stranded cable indicates that: - Correct Answer
- It will be used in an unbonded system application
Module 1. The most common post-tension cable tendons in use today are made up of: - Correct
Answer - 7 steel strands of wire wrapped together
Module 1. In an unbonded system, the force applied to the concrete after tensioning: - Correct
Answer - Comes from the anchorage zone only
Module 2. Post-tension manufacturing plants must be certified by: - Correct Answer - PTI
Unbonded Plant Certification Program
Module 2. Prior to cutting the tendon tails after tensioning, the field records of stressing activities
must be forwarded to and approved by: - Correct Answer - The engineer of record
Module 2. In the event that a new set of stressing equipment is delivered to the project, this
equipment should contain __________ for review prior being used on-site: - Correct Answer - A
current calibration chart relating gauge pressure to force applied
Module 2. According to the Field Procedures Manual for Unbonded Single Strand Tendons, all
of the following items are necessary for post-tension document control except:
A) Concrete Strength Results
B) Shipping Lists
C) Material Certifications
D) Approved Installation Drawings - Correct Answer - A) Concrete Strength Results
, Module 2. When reporting stressing results, the following information is necessary to record:
A) Jack and gauge serial number
B) Elongation measurements and percentage deviation
C) Both A and B
D) Gauge Manufacturer
E) All three, A, B, and D - Correct Answer - C) Both A and B
Module 2. When moving post-tension cables across the site, the use of _______ is permitted.
A) Nylon slings, with unloading as close as placement as possible
B) Smooth finished chains with limited use
C) Epoxy coated high strength wire with limited use
D) A large front loader exercising caution - Correct Answer - Nylon slings, with unloading as
close to the placement as possible
Module 2. When storing post-tension cables, care must be taken to: - Correct Answer - Prevent
the cables from being exposed to weather elements and moisture
Module 2. During deliver, it is the ______________ responsibility to ensure the delivered items
match the shipping list. - Correct Answer - Buyer's
Module 2. According to the Field Procedures Manual for Unbonded Single Strand Tendons, the
follow documents must be kept on site: - Correct Answer - 1) Approved Installation Drawings
2) Shipping Lists
3) Material Certifications
4) Jack Calibrations
5) Stressing Records
Module 2. Install drawings show: - Correct Answer - Plan views, elevation views, and details so
the subcontractor and inspector can clearly see the tendon layout. This includes tendon profiles,
also known as drape.
Module 2. Drape - Correct Answer - Tendon profiles
Module 2. Material Certifications - Correct Answer - Documents that describe the cables'
physical properties and factory testing results.
Module 2. Stressing records, written by the inspector, should include: - Correct Answer - -
Location of tendons stressed (grid line to grid line)
- Type of tendons stressed (banded, uniform, beans, temperature)
- Gauge/jack used
- Date, time, and weather during stressing
- Stressing crew
- Elongations based on a traceable numbering system
- Any deviations from tolerances
