Safety
Scaffolding must be strong enough to support what 3 main factors?
Workers, Tools, & Materials
What are the 2 common types of wooden scaffolding?
Single Pole & Double Pole
Metal tubular frames scaffolding consists of 6 main manufactured components, what are they?
1. End Frames 2. Crossbraces 3. Adjustable screw Legs 4. Baseplates 5. Platforms 6. Guardrail hardware.
System Scaffolds often start with what 4 members?
1. Mudsill
2. Baseplates
3. Starter Coller
4. Spigot
Loads Exerted on to the legs of scaffolds are _________ which is why we must use mudsills.
Not Equal.
What is the standard safety margin that scaffolds must be capable of supporting?
At least four times the maximum intended load.
What is the minimum height of a toe board? What must be installed if materials & tools are at risk of falling out over the top of a toe board?
3 1/2" Is the minimum height of a toe board & Screening must be installed if any material/ tools are at risk of falling out over toe boards.
What connects the top & bottoms of frames?
Crossbraces
What are the horizontal members that run the length of the scaffold called?
Ledgers or Runners
What is attached to ends of planks to prevent movement & risk of falling from bearers?
Cleats.
The type of scaffold to be erected depends on what 4 factors?
Location, the kind of work being performed, the distance above ground, & the load it is required to support.
What are the 6 main structural components of a wooden scaffolding assembly?
1. Mudsills
2. Poles
3. Ledgers
4. Bearers
5. Braces
6. Guardrails
At least how much of a Screw Jack must be inserted into the scaffold leg?
One Third.
What is the name of the vertical members that fit into the collars?
Standards
Planks Should not have more than a ______ gap between them.
1 Inch.
The employer is required to have a _____________ to supervise and direct the scaffold erection.
Competent Person.
Where & when should Guardrails be installed in a wooden scaffold assembly?
Between 40"-44" above the working platform, when the platform is more than 5' in height.
End Frames consist of 3 main structural components, what are they?
Posts, Horizontal Bearers, Intermediate members (ladder rungs)
A rest platform is required for every __________ of ladder.
35 Feet
Three Times.
When should visual inspection of scaffold parts take place?
What is the preferred material used for planks in a wooden scaffold assembly?
2"x 10" Material
What is used to keep a Mobile Tower frame square?
Diagonal Horizontal Braces, or Gooser Braces.
What are the names of 5 common clamps used in tube and clamp scaffolding?
1. Right- angle Clamps
2. End-to-end Clamps
3. Swivel Clamps
4. Parallel Clamps
5. Concrete Clamps.
When installing outriggers on a mobile scaffold what is the most important factor to consider?
That you can locate outriggers on both sides of the scaffolding to prevent tipping.
If outriggers cannot be located on both sides the opposite side of the scaffolding must be tied into the building/ Structure being worked on somehow to prevent tipping.