Bu basic CH12 Flashcards
1
Q
- Roof sheathing boards are generally what grade or better? (Page 12-5)
A
NO. 3 common
2
Q
- Open sheathing usually consists of 1 by 4 inch strips with on center (OC) spacing equal to the shingle weather exposure, but not over how many inches? (Page 12-6)
A
10 inches
3
Q
- Plank roof decking, consisting of what size and thicker tongue and groove planking, is commonly used for flat or low pitched roofs in post and beam construction? (Page 12-10)
A
2 inches
4
Q
- Decking comes in nominal widths of 4 to 12 inches and in nominal thicknesses of how many inches? (Page 12-10)
A
2-4
5
Q
- Decking 3 and 4 inches thick must be predrilled and toenailed with spikes of what length? (Page 12-11)
A
8 inches
6
Q
- What type of decking is weather resistant and protected against termites and rot? (Page 12-11)
A
wood fiber
7
Q
- Wood fiber decking is available in four thicknesses: 2 3/8 inches, 1 7/8 inches, 1 3/8 inches, and what other size? (Page 12-11)
A
15/16 inch
8
Q
- Roof decking that extends beyond gable end walls for the overhang should span not less than how many rafter spaces? (Page 12-12)
A
three
9
Q
- Where chimney openings occur in the roof structure what amount of clearance on all sides of the finished masonry should the roof sheathing have? (Page 12-12)
A
3/4 inch
10
Q
- To determine how much plywood will be needed, find the total roof area to be covered and divide by what number? (Page 12-14)
A
32
11
Q
- A square of roofing is the amount required to cover how many square feet of the roof surface? (Page 12-15)
A
100
12
Q
- What is the amount of weather protection provided by the overlapping of shingles? (Page 12-15)
A
coverage
13
Q
- What is the area that one shingle overlaps a shingle two courses below it known as? (Page 12-15)
A
head lap
14
Q
- For the best protection against leakage, shingles (or shakes) should be applied only on roofs with a unit rise of how many inches or more? (Page 12-15)
A
4
15
Q
- What term refers to the incline of a roof as a ratio of vertical rise to horizontal run? (Page 12-16)
A
slope
16
Q
- What is the incline of a roof as a ratio of the vertical rise to twice the horizontal run? (Page 12-16)
A
pitch
17
Q
- The four types of underlayments that builders generally work with include asphalt felt, organic, glass fiber, and what else? (Page 12-17)
A
tarred
18
Q
- What provides protection from ice dams on roofs? (Page 12-19)
A
eave flashing
19
Q
- What are used as underlayment for shingles, for sheathing paper, and for reinforcements in the construction of built up roofs? (Page 12-20)
A
asphalt felt
20
Q
- Flashing materials used on roofs may be asphalt saturated felt, metal, or what else? (Page 12-20)
A
plastic
21
Q
- Strip shingles are usually laid over a single thickness of asphalt saturated felt if the slope of the roof is greater than what? (Page 12-26)
A
4:12
22
Q
- Strip shingles can be laid starting at either end on small roofs up to how many feet long? (Page 12-26)
A
30 feet
23
Q
- Wood shingles are available in what three standard lengths? (Page 12-28)
A
16, 18, and 24 inches
24
Q
- Concrete tiles are designed for minimum roof slopes of what? (Page 12-33)
A
2 1⁄2:12
25
Q
- The weight of a slate roof ranges from 700 to how many pounds per square depending upon thickness? (Page 12-33)
A
1,500
26
Q
- Slate is usually laid like shingles, with each course lapping the second course below at least how many inches? (Page 12-33)
A
3
27
Q
- What type of roofs are entirely unaffected by water? (Page 12-34)
A
coal tar pitch
28
Q
- What is the most common type of ridge and hip finish for wood and asphalt shingles? (Page 12-34)
A
boston ridge
29
Q
- What forms a seamless, waterproof, flexible membrane that conforms to the surface of the roof deck and protects all angles formed by the roof deck and projecting surfaces? (Page 12-37)
A
bitumen
30
Q
- Heating asphalt to over 500 degrees F for a prolonged period may decrease the weather life by as much as what percent? (Page 12-38)
A
50%
31
Q
- Bitumens are spread between felts at rates of how many pounds per square depending on the type of ply or roofing felt? (Page 12-38)
A
25-35
32
Q
- What is each layer of built up roofing called? (Page 12-39)
A
ply
33
Q
- What is the minimum lap for bevel siding? (Page 12-46)
A
1 inch
34
Q
- On long runs of gutters at least how many downspouts are desirable? (Page 12-55)
A
4
35
Q
- Gutters should be installed with a pitch of 1 inch per how many feet toward the downspouts? (Page 12- 55)
A
16
36
Q
- What should be the minimum length of a splash block? (Page 12-56)
A
3 feet
37
Q
- Wood jambs are manufactured in two standard widths, 5.25 inches for lath and plaster, and how many inches for drywall? (Page 12-58)
A
4.5
38
Q
- What type of door is one that is cut and hinged so that the top and bottom portions open and close independently? (Page 12-61)
A
dutch door
39
Q
- Because of their size, stationary windows require a sash of what thickness to provide strength? (Page 12-65)
A
1.75 inch
40
Q
- Polished plate glass is furnished in thicknesses from 1/8 inch to what? (Page 12-65)
A
1.25 inches
41
Q
- What is plate or patterned glass that has been reheated to just below its melting point and then cooled very quickly by subjecting both sides to jets of air? (Page 12-68)
A
tempered glass
42
Q
- Metal sash putty should be painted within how many weeks after application? (Page 12-70)
A
2 weeks
43
Q
- Sheet glass is produced in a number of thicknesses, but only 3/32 and what other size sheets are commonly used as a window glass? (Page 12-72)
A
1/8 inch
44
Q
- What refers to the installation of glass in prepared openings of windows, doors, partitions, and curtain walls? (Page 12-74)
A
glazing
45
Q
- Flexible insulation is manufactured in what two types? (Page 12-77)
A
blanket and batt
46
Q
- Ceiling insulation of how many or more inches thick greatly reduces heat loss in the winter and also provides summertime protection? (Page 12-83)
A
6
