問題一覧
1
What are the three main objectives of good form work?
safety quality economy
2
Hydrostatic pressure is directly proportional to ?
height
3
Dividing the height of pour by pour time will equal?
rate of placement
4
Concrete density multiplied by the rate of placement equals ?
maximum pressure
5
The bending of plywood between supports is known as ?
deflection
6
Deflection limit for architectural concrete formwork is ?
1:360
7
Installing form fly with a face grain parallel to supports can lead to increased ?
deflection
8
What tie are used in the cam lock system?
loop end ties
9
In the vertical member placed outside The Wailers on the form is called a ?
strongback
10
What ties are suited for non-standard wall thickness, or tapered ties?
coil ties
11
As lateral pressure increases, what should decrease ?
tie spacing
12
What does SWL stand for?
safe working load
13
The standard SWL for ties has a safety factor of ?
2:1
14
When designing gang forms, consider what 2 factors with the crane?
capacity and reach
15
What is a gang form?
A large form used for pouring walls
16
What is a fly form?
A large form used for pouring slabs
17
More form failures occur in what season than others ?
winter
18
The place where a tie is designed to snap is called the ?
break back point
19
Increasing bearing area helps in relieving ?
crushing pressure
20
When using coil ties, the rod should ?
Extend through the tie end by one rod diameter
21
When constructing a rough buck it is good practice to make it ?
Slightly narrower than the wall
22
Recess form into a wall is called a ?
box out
23
If you are using through ties in your formwork, you must also incorporate the use of ?
tie sheaths
24
Columns must be braced to resist ?
racking
25
outside core forms should be made to allow for a ?
Reduction in wall thickness on tall structures
26
Is essential that inside core forms be ?
Easily removable
27
levelling blocks are required for?
Inside core form in order to keep the shaft plum
28
On a round wall, the outside length will be ?
2 x 3.1416 x wt
29
On a banded column, it is important to ?
Chase the corner, so the form isn’t distorted
30
Square forms with fillers are economical way to form ?
irregular shapes
31
An optical plum can be used to ensure that a ?
vertical slip form isn’t drifting
32
To plumb a slip form, it may be necessary to ?
Reduce, or increase the Jack rate from one side of the form to the other
33
When multiple buildings are joined together, care must be taken to avoid ?
differential settlement
34
Foundation wall that is wide at the bottom and tapers to a narrow top is called a?
battered foundation
35
What is the Alberta building code requirement for ground cover for footings?
1200mm
36
The depth of plain concrete footings must be ?
Equal to, or greater than their projection
37
Footing reinforcement must be ?
Supported to ensure proper coverage
38
The minimum run for a step footing is ? and the maximum rise is?
600mm 600mm
39
Widening of the foundation wall is called a
pilaster
40
(battered footing) to resist uplift forces. what is installed?
Ballast is installed around the form for a battered footing
41
When heavy loads are imposed on a small footprint, what may be used?
raft foundation
42
A bored loadbearing cast in place concrete pile is often referred to as a?
caisson
43
pile capacity is achieved from either ?
end bearing or friction
44
piles can be driven using a?
drop, diesel or vibrating hammer
45
In making an end bearing pile a what is used?
belling tool
46
Pile reinforcement in a compacted pile is added ?
after the bulb is complete
47
Hydraulic drilling is known as?
jetting
48
When drilling a pile and sub surface, water or sloughing, is encountered, what must be installed ?
caisson
49
When an unstable layer is too deep to use a caisson what type of drilling must you do?
mud drilling
50
In soft or loose granular soils what type of pile is used?
compacted pile
51
Compacted piles achieve their capacity by ?
increasing bearing area and soil density
52
With driven steel or timber piles capacity is achieved when ?
the target blow count is reached
53
And advantage of step tapered piles is that they are ?
Water tight and have large bearing capacity
54
Sheet piling would be used to make a ?
cofferdam
55
To resist, overturning soldier, piles must be ?
tied back
56
The rough sawn lumber installed between soldier Piles is called. ?
lagging
57
Shallow reinforced concrete wall spanning two or more supports is called a?
gradebeam
58
void form can be used to?
Relieve uplift pressure on a grade beam
59
pile caps can provide the transition between ?
Piles and columns
60
Compacted piles are filled with ?
dry mix concrete
61
A type of slab supported directly on top of the column is called a ?
flat plate slab
62
Drop panels and capitals are used to counteract ?
punching shear
63
Drop panels are ?
Cast with the slab and capitals are cast with the column
64
A beam may be supported by a ?
Column or girder
65
Flat plate slabs are most commonly used in the construction of ?
high rise apartments
66
Void form slabs are designed to ?
Mimic a wood frame floor system
67
Stationary slab forming requires the assembly and disassembly of formwork……
piece by piece
68
wedges for shoring are typically cut at what ratio?
1:12
69
A double pole shore is also known as a ?
bent
70
Height adjustments on u heads must be limited to ?
2/3 overall length
71
Never mix materials for Shores as they can ?
React differently under load
72
Shoring must never be supported on
Frozen or unstable ground
73
Placement of decking should minimize waste and?
Lend itself to strip ability
74
To minimize deck, deflection lay decking
Perpendicular to joist and over multiple supports
75
The next step after removing a fly form is too
re shore
76
Three layer rafting is also called
grillage
77
Spandrel beams are located around the slab perimeter, and ?
Supports load from the slab an exterior finishes
78
Camber is used to counteract
deflection
79
The size of a fly form is a dependent on
Floor layout, and crane capacity
80
If a beam side is formed with the fly form, it is important to
Slope the beam side
81
Narrower fly forms may allow for
earlier stripping
82
When suspending formwork from a steel beam, what type of hanger can be used?
saddle
83
To reduce the slenderness ratio of Shores, what can be installed?
lacing
84
Slenderness ratio maximum unsupported length is calculated by
Multiplying 50 times the smallest material dimension
85
Lacing should be installed ?
Slightly above mid height
86
c hook is a crane attachment design for flying ?
table forms
87
When hooking up a fly form to the crane, you must be
tied off too structure