Roof Construction Theory
This term is used to describe the horizontal distance between the outside top plates.
What is the span?
A fall hazard survey/assessment shall be conducted _________ for comparison purposes.
What is annually?
Tube and coupler scaffolding couplers may not be made out of what material.
What is gray cast iron?
This component provides the main support for a stairway.
What is a stringer?
Rafter Math
16 ft Span
5/12 Pitch
18" projection
What is the TRLL?
1)16' / 2= 8' Total Run
2) 52 + 122= 169 (13") BM
3)13" X 8'=104" RLL
4)13" X 1.5'=19.5" TLL
5) 104" + 19.5"=123.5" TRLL or 10' 3 1/2" TRLL
123.5/12=10.29
.29 X 12= 3.5
.5 X 16= 8/16 = 1/2
The altitude of the right angle represents the ________ of a common rafter.
What is the total rise?
Post shall be placed no more than _____ feet apart on centers.
What is 8'?
When on scaffolding, electric power tools must be protected by the use of _______.
What is GFCI's?
This component is the piece forming the vertical face of the step.
What is a riser?
You have a building with a gable roof, 16' X 40' with a 7" unit of rise and an overhang of 18" on both rakes and eaves.
How many sheets of 4' X 8' plywood do you need?
What is 28 sheets?
43 X 10.29=442.47
442.47 / 32 SF (4X8 plywood)= 13.827 one side
14 X 2= 28 sheets total
Upright framing members that provide a nailing surface for siding and sheathing at the gable ends of the roof.
What is gable end studs?
Connects the harness to an anchorage and reduces the forces of a fall through an integral shock absorber.
What is a Lanyard?
Scaffolds must be at least _______ feet from power lines?
What is 10'?
Stringers are usually ____ solid pieces of dimensional lumber.
What is 2" X 12"?
How many risers are required for a stairway with a total rise of 13 feet 6 inch with a complete top tread?
What is 23 risers?
Top chords have a _______ force while the bottom chords has a pulling apart, or tension, force.
What is compression?
The top rail on a guardrail system shall be _______ inches high, plus or minus 3 inches, above walking/working level.
What is 42"?
Braces, tie-ins, and guying are used to prevent _______.
What is tipping?
Unit run is calculated by the rule that the sum of the unit run and unit rise should be _____ inches.
What is 17 1/2"?
How long are the stringers for a stairway with a total rise of 13 feet 6 inch with a complete top tread?
What is 24'-2 1/16"?
The length of the seat cut equals _____________.
What is the width of the top plate?
A device that automatically engages and locks to arrest the fall of a worker.
What is a rope grab?
In tube and coupler scaffolding erection, horizontal tubes are connected to upright tubes using ____________.
What is right-angle and swivel clamps?
The number of risers is calculated by dividing the total rise, in inches, by the industry standard average unit of rise, _______ inches.
What is 7"?
What is the total run for a stairway with a total rise of 8 feet 6 inch with a complete top tread?
What is 143.08"?