2024 IBC

Question 1

Stirrups are usually closer together at _______

Answer 1

C. The supports

Stirrups are designed to provide shear resistance and are more concentrated where shear forces are higher.

Question 2

Stirrup usually refers to part of the reinforcing steel placed in a _______

Answer 2

A. Beam or slab

Stirrups help maintain the integrity of beams and slabs under load.

Question 3

Plain reinforcement is reinforcing steel that _______

Answer 3

B. Has fewer or no deformations

Plain reinforcement typically has a smooth surface, unlike deformed bars which have ridges for better bonding.

Question 4

Reinforcing bars that have both an S and a W cast into the bar in the third position from top indicate that the bar is acceptable as _______

Answer 4

A. Both ASTM and AASHTO acceptable

This marking ensures compliance with various standards for structural applications.

Question 5

Which requires the most expended applied force to achieve, the yield strength of rebar or the tensile strength of rebar?

Answer 5

B. Tensile

Tensile strength is typically greater than yield strength, requiring more force to break the material.

Question 6

How is Grade 75 steel designated?

Answer 6

D. A and C

Grade 75 steel is designated by 1 grade line plus 2 main ribs or 2 grade lines plus 2 main ribs.

Question 7

What does the third character rolled into the surface of an A 706 bar indicate?

Answer 7

A. Minimum yield designation

The third character indicates the minimum yield designation.

Question 8

What does the letter ‘H’ on rebar designate?

Answer 8

A. Low-Alloy

The letter ‘H’ designates low-alloy steel.

Question 9

What letter marking should the inspector check for code conformance of carbon steel bars?

Answer 9

A. N

The inspector needs to check for the letter ‘N’ marking on the bars.

Question 10

In ASTM A615, which grade of billet steel is not required to have a grade mark?

Answer 10

A. 40

Grade 40 billet steel is not required to have a grade mark in inch pound or metric.

Question 11

According to ASTM A615, carbon steel comes in how many grades?

Answer 11

4

ASTM A615 specifies four grades of carbon steel.

Question 12

Welded deformed wire reinforcing used for stirrups should conform to which standard?

Answer 12

ASTM A955

ASTM A955 specifies standards for welded deformed wire reinforcing.

Question 13

What is the maximum yield value specified by ASTM A955 for wire used in stirrups?

Answer 13

70,000 psi

ASTM A955 specifies a maximum yield value of 70,000 psi.

Question 14

What is the tensile strength of grade 60 carbon reinforcing steel?

Answer 14

60,000 psi

Grade 60 carbon reinforcing steel has a tensile strength of 60,000 psi.

Question 15

When ASTM A706 rebar is made, what is its minimum yield strength?

Answer 15

60,000 psi

ASTM A706 specifies a minimum yield strength of 60,000 psi for rebar.

Question 16

Fill in the blank: The tensile strength of grade 60 carbon reinforcing steel is _______.

Answer 16

60,000 psi

Question 17

True or False: ASTM A706 rebar has a minimum yield strength of 50,000 psi.

Answer 17

False

The minimum yield strength for ASTM A706 rebar is 60,000 psi.

Question 18

What is the yield strength of ASTM A706 rebar?

Answer 18

60,000 psi

ASTM A706 rebar is specified to have a yield strength of 60,000 psi.

Question 19

Stirrups No. 8 bar and smaller must have, either a 90 degree or a _______ degree turn plus an extension of at least _______ bar diameters at the free end of the bar.

Question 20

A standard hook is which one of the following?

Question 21

For a No. 8 bar, the minimum diameter of a fabrication bend shall be _______.

Question 22

A standard hook with a 180 degree bend shall have a _______ extension but not less than _______ at the free end of the bar.

Question 23

A stirrup for a #6 bar shall consist of a 90 degree hook plus a 9 extension at the free end of the bar.

Question 24

A seismic hook on a circular hoop shall have a bend of _______ degrees and the hook shall have an extension of at least _______.

Question 25

For No. 5 bar and smaller, what is the minimum inside diameter of bends for stirrups and ties?

Question 26

Diameters of bend, when measuring right angle hooks or a tie is measured to the _______.

Question 27

A building is designed to have ties on the reinforced concrete columns in accordance with the code. The ties are designated as #4 in size, what diameter mandrel or pin is used to make the necessary bend on the corners of the tie?

Question 28

What is the minimum number of vertical bars in compression members within rectangular ties?

Question 29

A circular tie for non-prestressed columns on moment frames shall contain at least _______ longitudinal bars.

Question 30

What is the minimum number of longitudinal bars in compression members required to be when enclosed within a spiral?

Question 31

When placing ties, at least _______ bars need to be within a triangular tie of the columns of special moment frames.

Question 32

Bar extension refers to _______.

Question 33

The tolerances for truss bar overall length as they fit into forms are found on _______.

Question 34

With respect to fabrication of reinforcing bars, a No. 6 size bar has a minimum diameter bend of _______ bar diameters.

Question 35

The amount of steel at the free end of a #6 bar bent at a 90 degree angle is _______ to create a standard hook.

Question 36

The nominal inside bend diameter of a #8, 60 grade deformed bar standard hook is _______.

Question 37

What size diameter mandrel or pin must a No. 6 bar of plain carbon steel be bent around for fabrication?

Question 38

Fabrication bends in reinforcing bars No. 9, No. 10, and No. 11, shall be made around pins of what diameter?

Question 39

When deformed bars are to act in tension and a #14 bar is required to be bent into a 180 degree bend at one end the size mandrel or pin it must be bent around is _______.

Question 40

A rectangular tie, made at a fab shop that is supposed to be 11 inches long and 8 inches across can be as much as _______ short, length wise and still be within specifications.

Question 41

Tolerances for pre-bent pieces are important to both the installer and the inspector. If a circular tie is made for a column that is 32 in diameter the tolerance for the diameter of the tie is _______.

Question 42

According to the rules of tolerances on rebar the amount that a #5 bar 16 long can be short or long when ordered for a jobsite can be _______.

Question 43

A rectangular stirrup is made for a beam for a parking structure, the length of the beam is 184, the width of the beam is 23, and the depth of the beam is 26 outside measurements. The stirrups as made measure 22 1/2" x 27 1/2". Is this acceptable?

Question 44

When delivered to the jobsite, reinforcing steel should be free of rust.

Question 45

Epoxy coating of steel reinforcement is an _______ surface condition of reinforcement

Question 46

All reinforcement shall be bent cold, unless otherwise permitted by the _______.

Question 47

Welding of crossing bars for assembly of reinforcement shall not be permitted unless authorized by the engineer.

Question 48

When inspecting the placing of reinforcing steel the inspector should check _______ before the steel is tied rigidly in place.

Question 49

Field bending of rebar partially embedded in concrete is prohibited by code.

Question 50

How many types of splices does the Concrete Manual show?

Question 51

What is the largest size rebar that can be lapped to another bar of the same size?

Question 52

A class B splice is approximately _______ longer than a class A splice.

Question 53

Bars spliced by non-contact lap splices in flexural members shall not be spaced transversely farther apart than _______ the required lap splice length nor _______ inches.

Question 54

When splicing bundled bars as in a beam may the entire bundle be lap spliced provided the individual bar splices do not overlap?

Question 55

When spliced by a non contact lap splice (40 bar diameters in a beam), the maximum distance that #8 bars shall be spaced is _______ inches apart.

Question 56

Compression lap splice length for bars less than 60,000 psi is the longer of 0.00005fydb and _______ inches.

Question 57

The lap splice length of deformed reinforcement in compression in concrete less than 3000 psi in strength shall be increased by _______

Question 58

When the strength of the reinforcing bars are greater than 80 ksi, the length of a lap splice in compression shall be increased by _______.

Question 59

Tension lap splice length of welded plain wire reinforcement in tension between outermost cross wires of each reinforcement sheet shall be at least the greatest of _______.

Question 60

When making lap splices of welded deformed wire reinforcement in tension the lap will be overlapped between outer most cross wires of each reinforcement sheet at least _______ inches.

Question 61

In splicing welded plain wire reinforcement in tension and the area of reinforcement provided is less than twice that required by analysis at splice location the length of the overlap measured between outermost cross wires of each fabric sheet shall be not less than one spacing of cross wires plus _______ inch/inches.

Question 62

When splicing bars by the welding method and preheat is being used, the bars to be welded must be preheated to the required temperature a minimum of _______ inches each side of the weld location.

Question 63

The inspector doing the inspection of the welded splices should verify that the correct electrodes are being used and that they are _______.

Question 64

Wire bar supports are furnished in _______ classes depending on their expected exposure and degree of corrosion protection required.

Question 65

Class _______ is used for maximum protection for rebar.

Question 66

The tie wire used to tie the rebar together to resist movement is usually size No. _______.

Question 67

What does Class 3 bright basic bar supports refer to?

Question 68

Bar supports manufactured with moderate protection are listed as _______.

Question 69

Type B bar stainless steel protected bar supports have no nonstainless steel wire of the bar support closer than _______ from the form surface.

Question 70

Does tying rebar add strength?

Question 71

According to the Concrete Manual, the easiest method of tying rebar together is called a _______ tie.

Question 72

The outside face of a 12 thick wall is designed to have 1 1/2 of cover between the reinforcement and the face of concrete, according to the Concrete Manual the tolerance for this is _______ inch.

Question 73

In a wall more than 8 inches wide, what is the tolerance of the minimum allowable concrete cover?

Question 74

Tolerance for longitudinal location of ends of bars ACI 318 26.6.2.1.(b) is illustrated in _______.

Question 75

Tolerance for longitudinal location of bends and ends of reinforcement shall be plus or _______ inches except at discontinuous ends.

Question 76

Tolerance for longitudinal location of bends at discontinuous ends of reinforcement shall be plus or minus ______ inch at the ends of brackets and corbels.

Question 77

What is the tolerance for the longitudinal location of bends and ends of reinforcement?

Question 78

The placing tolerance for the location of bar ends in general concrete construction is _______.

Question 79

When placing reinforcing steel in a beam form that is 4 wide the tolerance for bar placement is _______.

Question 80

The tolerance for concrete cover in member sizes over 12 is _______.

Question 81

The plans call for 1 1/2 of concrete cover on an 8 wall, the actual amount of cover can be _______ using the tolerance allowed.

Question 82

Cast-in-place concrete cast against and permanently exposed to earth shall have at least ________ of cover.

Question 83

What is the minimum concrete cover for pipes and fittings embedded in concrete not exposed to weather?

Question 84

For a cast in place non-prestressed slab on grade, a layer of #4 bars is placed on top of dobies that are on the ground, the thickness of the dobies must be _______

Question 85

The minimum concrete cover allowed on a nonprestressed concrete tilt-up panel exposed to weather, reinforced with #6 and #7 size rebar is _______.

Question 86

After form removal, what is the minimum concrete cover for No. 5 reinforcement in walls exposed to the ground?

Question 87

A row of No. 8 bars are placed in a beam that is not to be exposed to weather or in contact with the ground, the stirrups that encircle the row of bars shall have how much clearance between the stirrup and the surface of the concrete.

Question 88

The minimum allowable concrete coverage for vertical #7 rebar used in a wall not exposed to weather shall be _______,

Question 89

What is the required concrete cover for reinforcement in slabs, not exposed to weather for #14 bars and larger?

Question 90

For bundled bars, minimum concrete cover shall be equal to the equivalent diameter of the bundle, but not be greater than _______ inches.

Question 91

What is the minimum concrete cover for pipes and fittings embedded in concrete not exposed to weather?

Question 92

A reasonable guide for placing adequate support devices for supporting WWR in a slab that is to be made of W or D5 to W or D 8 or larger is to place the supports every _______ feet

Question 93

Plain welded wire is spliced by overlapping so that the overlap, measured between the outermost cross wires of each sheet, is not less than the spacing of cross wires plus _______.

Question 94

Epoxy-coated reinforcement (bars and welded wire) has been in use since _______.

Question 95

What does ASTM A775 refer to?

Question 96

ASTM _______ covers epoxy-coating of straight bars that are then fabricated after coating.

Question 97

Just prior to placement of concrete epoxy-coated reinforcement should be checked for _______.

Question 98

For inspection of epoxy-coated welded wire fabric, the special inspector must refer to recognized ASTM Standard _______.

Question 99

Galvanized reinforcing bars are covered under ASTM _______.

Question 100

Fiberglass reinforcement is made from high strength glass fibers and vinyl resin, this type of reinforcing is called_______.

Question 101

For post-tensioned construction, the code permits a difference of _______ percent between the jacking force specified and the jacking force measured using calibrated stressing equipment.

Question 102

Does plain concrete require reinforcement around openings?

Question 103

At least _______ #_______ bars shall be provided around all window and door openings.

Question 104

In plain concrete, a minimum of 2 #5bars are required to be placed around openings for doors, windows or similarly sized openings that shall extend _______ beyond the corners of the openings.

Question 105

Minimum thickness of exterior basement and foundation walls shall not be less than _____ inches.

Question 106

Thickness of plain concrete bearing walls shall not be less than _______ the unsupported height or length whichever is less and not less than _______.

Question 107

The overall thickness of structural plain concrete footings shall not be less than _______ inches.

Question 108

What additional reinforcement is required around all window and door openings in a concrete wall with two layers of reinforcing steel?

Question 109

When a wall off plain concrete has only one layer of reinforcement, what additional reinforcement is required at openings?