MIOSHA: Summary: Part 12 Scaffolds and Scaffold Platforms Flashcards
(91 cards)
1
Q
Cleat means X.
A
a structural block used at the end of a platform to prevent the platform from slipping off its supports.
2
Q
Cleats are also used to
A
provide footing on sloped surfaces such as crawling boards
3
Q
Competent person means
A
a person who is experienced and capable of identifying an existing or potential hazard in surroundings, or under working conditions, that are hazardous or dangerous to an employee and who has the authority and knowledge to take prompt corrective measures to eliminate the hazards.
4
Q
Crawling board sometimes called a chicken ladder , means
A
a plank that has cleats, which are spaced and secured, at equal intervals for use by an employee on roofs.
5
Q
Form Scaffold means
A
a supported scaffold that consists of a platform supported by brackets attached to the form work .
6
Q
A crawling board is not designed to
A
carry any material.
7
Q
Heavy-duty scaffold means
A
a scaffold that is designed and constructed to carry a working load of not more than 75 pounds per square foot.
8
Q
Horse Scaffold means
A
a supported scaffold that consists of a platform supported by construction horses (sawhorses). Horse scaffolds constructed of metal are sometimes known as trestle scaffolds.
9
Q
Ladder jack scaffold means
A
a scaffold that is supported by brackets attached to ladders.
10
Q
Lean-to scaffold means
A
a supported scaffold that is kept erect by tilting it toward, and resting it against, a building or structure.
11
Q
Mobile scaffold means
A
a powered or unpowered portable caster or wheel-mounted supported scaffold.
12
Q
Pump-jack scaffold means
A
a scaffold for light-duty work that consists of vertical poles, platform planking, and movable brackets for raising or lowering the platform on the vertical poles by a manual pumping action.
13
Q
Qualified person
A
means one who, by possession of a recognized degree, certificate, or professional standing, or who by extensive knowledge, training, and experience, has successfully demonstrated
his or her ability to solve or resolve problems related to the subject matter, the work, or the project.
14
Q
Roof bracket scaffold means
A
a rooftop-supported scaffold that consists of a platform resting on angular-shaped supports.
15
Q
Rough terrain forklift truck means
A
a wheeled-type truck which is designed primarily as a fork truck that has a vertical mast or pivoted boom, or both, and that is intended for operation on unimproved natural terrain as well as the disturbed terrain of construction sites.
16
Q
Tubular welded frame scaffold or “fabricated frame scaffold” means
A
a scaffold platform that is supported by a metal sectional frame that consists of posts and a horizontal bearer that has intermediate members.
17
Q
B. Training requirements
An employer shall have each employee who performs work on a scaffold trained by a person qualified in scaffold safety. The training shall enable an employee to recognize the hazards associated with the type of scaffold being used and to understand the procedures to control or minimize the hazards. The training shall include the following areas as applicable:
a.
b.
c.
A
a. Electrical hazards.
b. Fall protection.
c. Material loads
18
Q
B. Training requirements
An employer shall have each employee who is involved in erecting, disassembling, moving, operating, repairing, maintaining, or inspecting a scaffold X
A
trained by a competent person to recognize any hazards associated with the work in question.
19
Q
C. Construction and capacity generally.
A scaffold shall be designed, constructed, erected, and used in accordance with the provisions of this part. A scaffold shall be designed by X
A
a qualified person.
20
Q
C. Construction and capacity generally.
A scaffold shall not be X, except under the supervision of a competent person.
A
erected, moved, dismantled, or altered
21
Q
C. Construction and capacity generally.
A scaffold and its components shall be capable of supporting, without failure, not less than X times the maximum intended load.
A
4
22
Q
C. Construction and capacity generally.
An employee on a scaffold who is exposed to an overhead hazard of falling material shall be protected with X
A
overhead protection that is sufficient to prevent injury.
23
Q
C. Construction and capacity generally.
All load-carrying wood members of scaffold framing shall be a minimum of X psi fiber stress value.
A
1,500
24
Q
C. Construction and capacity generally.
A X or Y shall not be used.
A
shore
lean-to scaffold
25
C. Construction and capacity generally.
An employee shall not be allowed within X feet of uninsulated energized electrical lines.
10
26
D. Guardrails; fall arrest devices
A guardrail shall be installed on any open side or end of a scaffold work platform that is X or more feet above the floor or ground.
10
27
D. Guardrails; fall arrest devices
An employer shall have a competent person determine the feasibility and safety of providing fall protection for X.
An employer is required to provide
fall protection for employees erecting or dismantling supported scaffolds where Y
employees erecting or dismantling supported scaffolds
the installation and use of the protection is feasible and does not create a greater hazard.
28
E. Planking and scaffold platforms generally
If wood planks are used for a work platform, then the planks shall be scaffold-grade lumber that has a minimum of X pounds per square inch fiber stress value.
The planks shall be not less than Y inches by Z inches. The platform shall consist of a minimum of Y
planks laid side by side. Each platform on all working levels of scaffolds shall be fully planked or decked between uprights where practicable. Spaces between the platform and the uprights shall not
be more than W inches.
1,500
2 by 10 in
2 planks
9 1/2
29
E. Planking and scaffold platforms generally
Where planks are lapped, each plank shall lap its bearer not less than X inches, which will provide a minimum overlap of Y inches.
6
| 12
30
E. Planking and scaffold platforms generally
Where a scaffold turns a corner, the planks shall be laid to X. The planks that run in the different direction shall be laid so as to Y
prevent tipping
extend over the rest on the first layer of planks.
31
E. Planking and scaffold platforms generally
When moving a platform to the next level, an employee shall leave X until the new platform supports have been set in place.
the old platform undisturbed
32
E. Planking and scaffold platforms generally
A platform shall not deflect more than X of the span when loaded.
1/60
33
E. Planking and scaffold platforms generally
The front of a platform shall be not more than X inches from the face of the work unless a guardrail system is erected along the front edge, or unless a personal fall arrest system is used, the maximum distance from the face of the work for plastering and lathing operations shall be not more than Y inches.
14
18
34
F. Protection from falling objects
In addition to wearing a hard hat, an employee on a scaffold shall be provided with additional protection from falling hand tools, debris, and other small objects through the installation of X or through the erection of Y that contain or deflect the falling objects.
toeboards, screens, or guardrail systems
debris nets, catch platforms, or canopy structures
35
F. Protection from falling objects
If there is a danger of tools, materials, or equipment falling from a scaffold and striking employees below, then one of the following provisions shall apply:
The area below the scaffold to which objects can fall shall be X
barricaded and employees shall not be permitted to enter the hazard area.
36
F. Protection from falling objects
If there is a danger of tools, materials, or equipment falling from a scaffold and striking employees below, then one of the following provisions shall apply:
If tools, materials, or equipment are piled to a height higher than the top edge of the toeboard, then X shall be erected for a distance sufficient to protect employees below.
paneling or screening extending from the toeboard or platform to the top of the guardrail
37
F. Protection from falling objects
If there is a danger of tools, materials, or equipment falling from a scaffold and striking employees below, then one of the following provisions shall apply:
A guardrail system shall be installed with openings X
small enough to prevent the passage of potential falling objects.
38
F. Protection from falling objects
If there is a danger of tools, materials, or equipment falling from a scaffold and striking employees below, then one of the following provisions shall apply:
A canopy structure, debris net, or catch platform that is X shall be erected over the employees below.
strong enough to withstand the impact forces of potential falling objects
39
F. Protection from falling objects
If used, toeboards shall be in compliance with both of the following provisions:
a. Be capable of withstanding, without failure, a force of not less than X pounds applied in any downward or horizontal direction at any point along the toeboard.
50
40
F. Protection from falling objects
If used, toeboards shall be in compliance with both of the following provisions:
b. Be not less than X inches high from the top edge of the toeboard to the level of the walking/working surface. A toeboard shall be securely fastened in place at the outermost edge of the platform and have not more than Y inch of clearance above the walking/working surface
3 1/2
1/4
41
G. Tubular welded frame scaffolds (fabricated frame scaffold)
The scaffold shall be braced by X, or both, for securing vertical members together laterally. The X shall be of sufficient length so that the erected scaffold is always plumb, square, and rigid. All brace connections shall be
made secure.
cross bracing or diagonal braces
42
G. Tubular welded frame scaffolds (fabricated frame scaffold)
The frames shall be placed one on top of the other with X to provide proper vertical alignment of the legs.
coupling or stacking pins
43
G. Tubular welded frame scaffolds (fabricated frame scaffold)
Where uplift may occur, frames shall be X by pins or other equivalent suitable means.
locked together vertically
44
G. Tubular welded frame scaffolds (fabricated frame scaffold)
A guy, tie, and brace shall be installed according to the scaffold manufacturer’s recommendations or at the closest horizontal member to the X ratio height and be repeated vertically at locations of horizontal members every Y feet or less thereafter for a scaffold 3 feet wide or less and every Z feet or less thereafter for a scaffold more than 3 feet wide. The top guy, tie, or brace of a
completed scaffold shall be placed no further than a 4 to 1 ratio height from the top. A guy, tie, and brace shall be installed at each end of the scaffold and at horizontal intervals of not more than W feet measured from one end, not both, towards the other.
4 to 1
20
26
30
45
G. Tubular welded frame scaffolds (fabricated frame scaffold)
Drawings and specifications for all tubular welded frame scaffolds over X feet in height above the base plates shall be designed by a qualified engineer who is knowledgeable in scaffolding. The plans shall be available at Y
125
the jobsite.
46
H. Horse Scaffold
The horse for a horse scaffold shall be built of X or material of equivalent strength and braced to resist side thrusts.
straight grained lumber
47
H. Horse Scaffold
A horse shall not be more than X feet in height and length
4 feet
48
H. Horse Scaffold
Nailing of extension pieces is X.
prohibited
49
H. Horse Scaffold
Horses shall
not be tiered.
50
I. Pump Jack Scaffolds
Pump jack brackets, braces, and accessories shall be fabricated from X. Each bracket shall have Y positive gripping mechanisms to prevent any failure or slippage.
metal plates and angles
2
51
I. Pump Jack Scaffolds
The platform bracket shall be
fully decked.
52
I. Pump Jack Scaffolds
Poles that are used for a pump jack shall not be spaced more than X feet center to center when wood scaffold planks are used for a platform. The spacing may be more than X feet center to center if a manufactured platform meets the requirements of this part.
10
10
53
I. Pump Jack Scaffolds
A pole shall be in compliance with all of the following provisions:
a. Not be more than X feet in height.
30
54
I. Pump Jack Scaffolds
A pole shall be in compliance with all of the following provisions:
Be secured to the structure by X, or equivalent, at the bottom, top, and other points as necessary to provide a maximum vertical spacing of not more than Y feet between braces.
rigid triangular bracing
| 10 feet
55
I. Pump Jack Scaffolds
A pole shall be in compliance with all of the following provisions:
Be made of X of Douglas fir, or the equivalent, or 2 continuous lengths made of 2 by 4s spiked together, with the seam parallel to the bracket, with Y common nails at not more than Z inches center to center.
2, 2 by 4s
10D
12
56
I. Pump Jack Scaffolds
Occupancy of a pump-jack scaffold shall be limited to X employees between any Y adjacent supports.
2_
2
57
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
Before an employee is elevated on a rough terrain forklift truck scaffold, a pre-lift meeting shall be held to review the appropriate requirements and procedures to be followed. The pre-lift meeting shall be attended by all of the following entities:
a.
b.
c.
d.
a. The lift operator.
b. The signalperson.
c. Employees to be lifted.
d. The person who is responsible for the task to be performed.
58
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
The scaffold platform shall be attached to the forks by X and shall be secured against the back of the forks with a Y so that the platform cannot tip or slip.
enclosed sleeves
mechanical device
59
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
The lifting carriage and the forks shall be secured to prevent them from X
tipping upward
60
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
An employer shall provide protection for an employee on the platform from moving parts and on lift trucks equipped with X. The side of the platform adjacent to the mast shall be protected by a Y that is sufficient in height and width to prevent contact with moving parts of the mast. On trucks equipped with rotators, the rotation shall be deactivated.
a lifting mast
| solid or mesh guard
61
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
A work platform shall be in compliance with all of the following requirements:
a. Be of welded mild steel construction that has a minimum safety factor of X times the maximum intended load.
4
62
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
A work platform shall be in compliance with all of the following requirements:
Have a X guardrail system constructed as follows:
continuous
63
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
A work platform shall be in compliance with all of the following requirements:
Have a top rail which is located not less than X inches, nor more than Y inches, above the platform floor and which is constructed to withstand a minimum of Z pounds of force in any direction.
36 inches
42 inches
200
64
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
A work platform shall be in compliance with all of the following requirements:
Have a midrail which is installed at mid-height between the top rail and platform floor and which is constructed to withstand a X-pound side thrust.
200
65
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
A work platform shall be in compliance with all of the following requirements:
Have a toeboard which is not less than X inches in nominal height and which is installed not more than Y of an inch above the floor around the periphery of the work platform. If the platform has a gate, then the toeboard shall be installed on the gate.
4
1/4
66
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
A work platform shall be in compliance with all of the following requirements:
Have a toeboard which is not less than X inches in nominal height and which is installed not more than Y of an inch above the floor around the periphery of the work platform. If the platform has a gate, then the toeboard shall be installed on the gate.
4
1/4
67
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
The work platform shall be X when in use.
level
68
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
If an employee is X in a platform on a variable reach lift truck, a personal fall arrest system, including the anchorage is required and shall be worn when an employee is X.
elevated
69
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
The rough terrain fork truck or the lift truck shall rest on X. Leveling devices and outriggers shall be used where provided on equipment.
firm footing
70
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
A trained operator shall X. The lift truck control or controls shall be in neutral and the parking brake set. The operator of the lift truck scaffold platform shall be able to see the elevated platform at Y.
remain at the operator station of a lift truck to control the lift truck while an employee is elevated
all times
71
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
A lift truck platform shall be returned to the ground X .The forklift shall be moved as close to the work area as possible for final positioning. An employee shall exit the landed platform and reboard the platform only Y
before a lift truck is repositioned
after the lift truck repositioning is completed.
72
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
The path that a lift truck platform travels shall be clear of hazards, such as X
storage racks, scaffolds, overhead obstructions, and electrical lines.
73
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
An employee shall maintain firm footing on the platform floor. Railings, planks, ladders, or other materials shall not be used X
on the platform to achieve reach or height.
74
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
The guardrail system of the platform shall not be used to support any of the following:
a.
b.
c.
a. Materials.
b. Other work platforms.
d. Employees.
75
J. Rough terrain forklift truck scaffolds; equipment requirements; employee safety requirements;
The platform shall be lowered to ground level for an employee to enter or exit, X. An employee may exit the platform Y
except where elevated work areas are inaccessible or hazardous to reach
with the knowledge and consent of the employer.
76
K. Operator training
An employer shall ensure that an employee X before the employee’s assignment as an operator of a rough terrain forklift truck that is used to elevate employees.
has been trained
77
L. Ladder jack scaffolds
A ladder jack scaffold shall be used only for light duty on type I manufactured ladders at heights not more than X feet from the ground or floor level.
20
78
L. Ladder jack scaffolds
The span of a wood plank shall be not more than X feet between ladder jacks.
8
79
L. Ladder jack scaffolds
The span of a pick shall not exceed X feet.
24
80
L. Ladder jack scaffolds
A ladder jack scaffold using planks shall be limited to X employees at any one time, except that if 3 ladders support the plank, 3 employees may occupy the plank. Not more than 1 employee shall occupy any given Y feet of plank at any one time.
2
4
81
L. Ladder jack scaffolds
A ladder jack scaffold using a pick shall be limited to X employees at anyone time, except that if 3 ladders support the pick, 3 employees may occupy the pick. Not more than 1 employee shall occupy any given Y feet of pick at any one time.
2
6
82
Maximum vertical Tie Spacing:
3'-0" and narrower bases:
Top of scaffold platform and uppermost tie not to exceed X ratio
4 - 1
83
Maximum vertical Tie Spacing:
3'-0" and narrower bases:
X max between intermediate ties
20'-0"
84
Maximum vertical Tie Spacing:
3'-0" and narrower bases:
X times minimum base tie at closest frame header or bearer
4
85
Maximum vertical Tie Spacing:
3'-0" and narrower bases:
First tie closest frame header or bearer above X times the minimum base dimension
4
86
Maximum vertical Tie Spacing:
3'-0" and narrower bases:
X and narrower minimum base dimensions
3'-0"
87
Maximum vertical Tie Spacing:
Wider than 3'-0" bases
Top of scaffold platform and uppermost tie not to exceed X ratio
4 - 1
88
Maximum vertical Tie Spacing:
Wider than 3'-0" bases
X max between intermediate ties
26'-0"
89
Maximum vertical Tie Spacing:
Wider than 3'-0" bases
First tie closest frame header or bearer above X times the minimum base dimension
4
90
Maximum vertical Tie Spacing:
3'-0" and narrower bases:
X times minimum base tie at closest frame header or bearer
4
91
Maximum vertical Tie Spacing:
3'-0" and narrower bases:
X than narrower minimum base dimensions
3'-0"
