問題一覧
1
tilt up Panel connections can be made by
Welding, bolting, or grouting
2
Rebar must be installed on what side of the concrete member?
tension side
3
Corroding rebar will cause the concrete to
spall
4
Water stop is spliced using a
hot iron
5
when fastening epoxy coated rebar use a
Nonmetallic tie
6
Why is there a bulb in the middle of a piece of PVC water stop
Allow for expansion
7
If panels are erected prior to floor installation, the panels are braced to
Dead man piles
8
Minimum coverage for rebar in a footing
75mm 3”
9
A post tension cable assembly includes (4 things)
Cable, duct, slab anchor, and clamping wedges
10
Sheer forces may be
Horizontal, vertical, or diagonal
11
A notch in beam which fits into a column projection is called a
dapped connection
12
A beam to column connection that uses wide flange Steel beam is called a
Hidden connection
13
What plan must be followed when erecting precast ?
Detail erection plan
14
Pretension and tendons are stretched too. What percent of the ultimate strength
70-80%
15
Water stop is used in a
Construction joint
16
Always install reinforcing in stairs before
riser forms
17
Fusion bonded epoxy, coated rebar is commonly used on bridge decks to prevent
corrosion
18
The recommended depth for a control joint
1/4 member thickness
19
One hollow core sits on top of a block wall The top of the wall must have a
bond beam
20
In most cases, 24 x the bar diameter would be the length of overlap at a
splice
21
Joints between tilt up panels are sealed with
Foam rod and caulking
22
Precast bean to column connections are always
Metal on metal
23
In a pretension beam after the concrete is cured, the tendons are
Released creating a camber
24
One method of laterally supporting the bottom of panels is to use
Slotted Pile caps
25
Prestressed Cast in place concrete is
Post tensioned
26
Long walls may require the installation of
Control joints
27
Black Annealed wire is used for tying
Standard rebar
28
The main purpose of welded wire fabric is to control
temperature cracking
29
wooden forms are covered with epoxy resin for a
Smooth finish endurability
30
Maximizing, aggregate and ensuring proper gradation will help control
shrinkage
31
Calcium chloride should never be used in
Prestressed concrete
32
Chamfer strip can be used to form a
Control joint in a wall
33
If rebar bears a W designation, it means it is
weldable
34
Pre-tensioning is dependent on the bond between the
Tendon and the concrete
35
Prestressing uses cables to put members into
Compression
36
Isolation joints allow the independence movement of
concrete member
37
When lifting tilt up panels rigging should include
Spreader bars and sheaves
38
Pour strips in walls that enhance construction joints are called?
Rustication strips
39
When erecting tilt up, the braces should be attached to the
Panel prior to lifting
40
When large compressive loads are acting a powder charged coupler may be used to make a
splice
41
In a cantilever beam the primary reinforcement should be placed
near the top of the beam
42
Without the engineers, consent, prestressed concrete must not be
Drilled Sawn shot or jackhammered
43
Drop panels are capitals are used to counteract
Punching sheer
44
A slab bulkhead with a keyway and protruding rebar is a
construction joint
45
Pre-tensioning is a Limited to
Precast concrete
46
Prestressing includes both
Pre-and post tensioning
47
Welded wire mesh is used in
Nonstructural slabs
48
Before post tension and can occur concrete must reach what percent of its design strength ?
60-80%
49
Control joint space, can be increased as slab thickness increases or if
Aggregate size increases
50
In soffit reinforcement, the bars running the width of the stairs are called
Temperature bars
51
To counteract shear forces in concrete beams , what type of bar is used?
stirrups
52
In the designation of WWF, the MW stands for
metric smooth
53
When erecting precast columns, the column is sat down on a shim pack, or
Levelling nuts