OSHA 30 Construction Scaffolding Flashcards
When must scaffolding be secured to and braced away from structure
when it reaches 4x its narrowest base dimension
What are the OSHA four common hazards for scaffolding
Falls from elevation, due to lack of fall protection.
Collapse of the scaffold, caused by instability or overloading.
Being struck by falling tools, work materials, or debris.
Electrocution, due to the proximity of the scaffold to overhead power lines.
what percent of injuries does scaffolding contribute to
17 percent
What are 4 of the types of scaffolding
tubular welded frame
tube and clamp
Metal A frame horse
rolling scaffolds
when must an engineer design a scaffolding construction
when it is higher then 125 feet
what are the scaffolding rules in regards to electrical lines
THEY MUST BE 3 FEET AWAY FROM LINES IF LINES ARE INSULATED AND UNDER 300 VOLTS
THEY MUST BE 10 FEET FROM LINE IF UNINSULATED OR OVER 300 VOLTS
WHEN ARE GUARD RAILS REQUIRED
WHEN SCAFFOLDS ARE ABOVE 10 FEET
WHAT ARE THE CATEGORIES FO SCAFFOLDS BASED ON LOAD CAPACITY
LIGHT TRADE 10 FOOT FRAME AT 25 PSF
MEDIUM TRADE 8 FOOT FRAME AT 50 PSF
HEAVT TRADE 6 FOOT FRAME AT 75 PSF
HOW STRONG MUST THE SCAFFOLD LEGS BE
BETWEEN 2000 AND 3000 LBS
A SCAFFOLD JACK MUST BE EXTENDED NO MORE THEN
2/3 ITS LENGTH
THE PAD THAT IS HOLDING THE SCAFFOLDING LEG MUIST BE
10”x10”x2”
WHAT ATRE THE CROSS BRACES FOR LIght and heavy trade scaffolds respectively
10 feet and 6 feet
how tall should guard rails be
39 inches
scaffolding planks must have a loading rating that is
1/4 the break strength
how far away from the scaffold face to the building should the scaffold be
14 inches
