Ladders and Scaffolds Flashcards
Site built ladders 5 m or less must have side rails at the bottom must be at least _____ mm. And the rungs must be at least _____ by _____ material.
500 mm
21 by 89
If a site built construction ladder is 5 m or less in unsupported length, it must have side rails composed of a material not less than _____ by _____ mm
38 x 89 (2x4)
Site built ladders in unsupported length must have side rails composed of _____ by ______. The width between side rails at the bottom must be at least ______. Rungs evenly spaced between _____ and _____ on centre.
Side rails are not notched T or F?
38 by 140
500 mm
250 and 300 mm.
T
Two-way construction ladders must have 3 ___________ rails, ____ by ____ rungs, with _____ by _____ filler blocks between the rungs.
38 by 140, 38 by 89, 38 by 38
Two way construction ladder rails should be at minimum ______ metre apart, have every spaced rungs at not more than _____ on centre.
1 metre, 300
A ladder should have this ratio?
4:1
What type of ladder is best suited for working near electricity or overhead power lines?
Fibreglass (non-conductive)
An extension ladder should be set at this angle?
75 degrees
What is the extra heavy duty ladder rating…
And maximum weight allowed?
Type 1A, 300 lb (136 kg)
What is a light duty and maximum weight for light ladder?
Type 3, 200lb (91kg)
What are the two types of scaffold systems?
Elevating working platforms
Frame scaffolds
How are frame scaffolds joined together?
With cross braces, connecting pins, bases, brackets, and guard rails.
The most common frame widths are?
The most common frame heights are?
- 914 to 1.524
1. 524 to 1.981
An employer shall ensure the load to which a scaffold is subjected at no time exceeds the equivalent of ____ of the load for which it is designed.
1/4
A scaffold is designed and constructed to support at least _____ times the load that may be imposed on it.
4
A scaffold is anchored by one tie for each ____ vertical interval and one tie for each ____ horizontal interval.
4.6, 6.4
The height for a free standing or rolling scaffold is not more than ____ times the smallest dimension of its base.
3
A worker shall not remain on a rolling scaffold unless the height of its work plat form does not exceed _____ the shortest base dimension
Twice
A guardrail is required whenever the height of a temporary work platform is _____ or greater.
3.0 metres
A guardrail must have a horizontal top member that is not less than ____ nor more than ______ above the base of the guardrail.
- 92
1. 07
A guardrail must have vertical members at both ends of the horizontal members with intermediate vertical supports that are not less than _____ apart o.c.
3 m
A toeboard required by regulation is not less than ______ I’m height above the surface of the work area.
140 mm
A toe board must be installed where there may be worked below a permanent floor, mezzanine, walkway, ramp or other surface where guardrail a have been installed or where it is possible for materials to fall ____ or temporary scaffold or work platform where it is possible for materials to fall more than _____
1.8, 3.5
A scaffold plank is constructed of at least number one grade ______ lumber with a wave limited to ____% of the width of the wide face of Plank.
51 x 254, 20#%
