H6

Question 1

what roof does the wall studs have to be shorter in order for the facia heigh and overhang dimensions to be equal?

Answer 1

The Major Roof wall

Question 2

if the wall heights are kept the same and the facias line up, what must be done to the minor roof projection?

Answer 2

he minor roof projection must be narrower

Question 3

what happens it the projection and wall heights don’t change?

Answer 3

the facia heights are different.

Question 4

what 3 slopes does an intersecting unequal sloped roof have?

Answer 4

Major Common slope, Minor Common slope, Valley slope

Question 5

how does the designer set the roof slope and height of ridge?

Answer 5

with the major common rafter slope

Question 6

will the minor roof slope be shallow or steeper?

Answer 6

steeper

Question 7

to layout a minor rafter, what side for the framing square would you use to lay out the total rise?

Answer 7

the body (or blade)

Question 8

what slope will the valley have?

Answer 8

the most shallow of the three

Question 9

Span on an unequal roof includes what?

Answer 9

the projection and facia

Question 10

what must be done when working above 25 feet?

Answer 10

a written fall protection plan must be made

Question 11

Building Code Span tables use what lengths to calculate the lengths of rafters?

Answer 11

horizontal lengths from ridge to plate but do not include the projections.

Question 12

what is the primary planning tool for unequal slope roofs?

Answer 12

a developed drawing showing full size rafters and intersections

Question 13

what are the first lines drawn on a developed drawing?

Answer 13

the centre lines

Question 14

what dimensions are measured from the developed drawing?

Answer 14

shortenings and side cuts of rafters

Question 15

what dimension does all three rafters use in the calculation?

Answer 15

total rise above facia

Question 16

what is the code minimum for the width of the seat cut?

Answer 16

1 1/2 inch

Question 17

what is the calculation for Difference in Major Jacks?

Answer 17

Spacing X M:m X MSR = DMJ

Question 18

what is the calculation for Difference in Minor Jacks?

Answer 18

Spacing / M:m X mSR = DmJ

Question 19

what Line length per unit of run do you use for sheathing cuts on unequal slope?

Answer 19

the common Line Length per unit run (LLPUR-C)

Question 20

what side of the square do you cut on?

Answer 20

the tongue side

Question 21

for face/miter cuts what is used not the tongue?

Answer 21

The Unit Run of the opposite roof that you are on

Question 22

for Edge/Bevel cuts what is used on the tongue?

Answer 22

Rise of the roof that you are on

Question 23

what is slope?

Answer 23

run to rise

Question 24

what is pitch?

Answer 24

span to rise

Question 25

If the facias are at the same height and the projections are the same what must be done to allow this?

Answer 25

the minor wall must be taller than the major wall

Question 26

if the wall heights stay the same and the facias are the same height what needs to happen?

Answer 26

the minor roof projection gets smaller

Question 27

If the projections and the wall heights stay the same what must be done?

Answer 27

the major roof facia will be higher than the minor roof

Question 28

In the span tables of the building code what is usually missed with unequal slope roofs?

Answer 28

the span tables go from support to support and unequal sloped roofs go from outside of facia. so to get the correct span the projections on both sides must be subtracted from the total span.

Question 29

What jack rafter is cut on less than 45 degrees

Answer 29

Minor Jacks

Question 30

What Jack rafter is cut on more than a 45 degree?

Answer 30

Major Jacks