Table of Contents
- 1 How much weight can a scaffold platform hold?
- 2 At what height does scaffold need outriggers?
- 3 What is heavy duty scaffolding?
- 4 What is the 3 to 1 rule in scaffolding?
- 5 Who should design a scaffold?
- 6 What is heavy scaffolding?
- 7 What is the height to base width ratio for mobile scaffolds?
- 8 What makes a special use scaffold special?
How much weight can a scaffold platform hold?
Multiply 35 square feet by 25 pounds per square foot and the scaffolding can be loaded with no more than 875 pounds….Rated Load Capacity.
| Rated Load Capacity of Scaffold | Intended Load Should Be |
|---|---|
| Light-Duty “standard” | 25 pounds per square foot (applied uniformly) |
What is an outrigger scaffold?
outrigger scaffold means a supported scaffold that consists of a platform resting on outrigger beams (thrustouts) projecting beyond the wall or face of the building or structure, with inboard ends secured inside the building or structure; Sample 1.
At what height does scaffold need outriggers?
. . . a free standing scaffold shall be considered safe when the total height is equal to or less than four times the minimum or least base dimension….OSHA.
| Model (not using outriggers) | Total height* at which restraint is required |
|---|---|
| 4-foot (26 inches wide) | over 8.668 feet |
| 6-foot (29 inches wide) | over 9.668 feet |
What makes a scaffold heavy duty?
They are: Light Duty – 25 pounds per square foot. Heavy Duty – 75 pounds per square foot. These ratings are based on the intended load, which is calculated by dividing the total weight to be placed between two spans of scaffolding by the total area between the two spans.
What is heavy duty scaffolding?
Scaffolds are temporary work platforms used in construction when work cannot be performed from the ground or from a finished floor. Heavy duty scaffolds safely support workers, hand tools, and the sustained weight of stored materials.
What is the maximum height for scaffolding?
Construction scaffolding safety is paramount. OSHA further states that scaffolds more than 125 feet in height above the base must be designed by a professional registered engineer. These scaffold height restrictions reflect the hazards and structural stress when working at such heights.
What is the 3 to 1 rule in scaffolding?
The 3 to 1 rule. The total working height of a freestanding scaffolding tower should be three (3) times the distance of the narrowest side of the base (if this is a measurement of outriggers, they must be set symmetrically about the tower). Always check for overhead power lines before moving any scaffolds.
What is the maximum height of a scaffold?
A mobile access tower (or ‘zip up’ tower) provides a free standing, stable working platform up to a maximum height of around 10-12m.
Who should design a scaffold?
What should drawings include? the drawings shall, at a minimum shall include a plan view and an elevation view, with full dimensions. what chapter is scaffolding in chapter 33? who is to install or remove scaffolds?
Who is responsible for designing a scaffold?
What is heavy scaffolding?
How does an outrigger scaffold support a building?
An outrigger scaffold is a supported scaffold consisting of a platform supported by outrigger beams (thrustouts) projecting beyond the wall or face of a building or structure with the inboard ends secured inside the building or structure.
What is the height to base width ratio for mobile scaffolds?
Criteria for supported scaffolds. (1) Supported scaffolds with a height to base width (including outrigger supports, if used) ratio of more than four to one shall be restrained from tipping by guying, tying, bracing, or equivalent means… [Emphasis added.]
How tall does a supported scaffold need to be?
A horse scaffold means a supported scaffold consisting of a platform supported by construction horses. Make sure these scaffolds are no more than 10 feet or two tiers in height, whichever is less. Each horse must be placed directly over the horse in the tier below.
What makes a special use scaffold special?
Special use scaffolds should be capable of supporting their own weight and at least four times the maximum intended load applied or transmitted to the scaffold and components. Form scaffold: A form scaffold is a supported scaffold consisting of a platform supported by brackets attached to a formwork.
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