H-6 Build Roof Systems

Question 1

What are the functions of a ceiling joist?

Answer 1

To tie rafter to support load and ceiling finishes to tie supporting walls together

Question 2

Which type of roof creates the most tension in ceiling, joist low slope, roof or high slope roof

Answer 2

Low slope

Question 3

What is the main difference between overhang and projection

Answer 3

Projection is horizontal, measurement, and overhang is length of rafter

Question 4

What is a fly rafter

Answer 4

Very outermost, rafter, supported by outriggers

Question 5

What is the unit run when using imperial system?

Answer 5

12 inches

Question 6

What is the unit run when using the Fredericks Square?

Answer 6

250 mils

Question 7

What is a working point

Answer 7

Measurement on rafter where cuts are laid out

Question 8

What is the difference between the line length and run of a rafter

Answer 8

Line length is along rafters length run is equal to , is the horizontal distance

Question 9

What is the difference between a ridge board and a ridge beam?

Answer 9

Ridgeboard to align commons, beams to be supported by roof joists

Question 10

How wide must’ve working deck bee for a single pull scaffold built along the wall

Answer 10

Double 2 x 10

Question 11

Why are rafters installed opposite each other in pairs

Answer 11

To keep bridgeboard true

Question 12

What does the accuracy of waste factors depend?

Answer 12

Depends on the builder and his practises

Question 13

Why is the ceiling Joyce cut 3/8 of an inch lower than the height of the rafters

Answer 13

So the ceiling joist don’t interfere with roof sheeting

Question 14

Why must’ve registered engineer design ceiling openings that require more than one ceiling choice to be cut?

Answer 14

Due to complicated tension loads

Question 15

How are the ceiling joist attached when supporting by a flush beam

Answer 15

Joist hangers and metal connecters across the top of the beam

Question 16

Wire insulation requirements of concern for when designing the size of rafter

Answer 16

Not enough depth for insulation

Question 17

What figures on the frame square used to lay out an angle cut on a gable stud

Answer 17

Rise and run “rise”

Question 18

What figures on the framing Square are used to lay out the plum cut on a common raft

Answer 18

Rise

Question 19

What figures on the framing square are used to lay out the seat, cut at the birds mouth for a common rafter

Answer 19

Run

Question 20

What is the minimum size of seat cut allowed by the BC building code?

Answer 20

1 inch seat cut

Question 21

What figures on the framing Square you used to layout slope cut on a collar tie

Answer 21

Run

Question 22

What are two ways of framing in the gable end of a building

Answer 22

Supported by Gabel are notched into common

Question 23

What is a sway brace

Answer 23

Brace to plum gable end

Question 24

How was the ridge laid out?

Answer 24

Ceiling joist layout

Question 25

What are age clips used for?

Answer 25

1/8 spacing

Question 26

What types of roofing requires strapping?

Answer 26

Metal tile or slate