CH 13

Question 1

It is recommended that a clear space of ____ be maintained in all directions from anyone using a cutting tool in vertical ventilation.

Answer 1

10 foot
pg 335

Question 2

A roof that decreases five inches vertically for each foot horizontally from the ridge would be described as a _____ roof, which is the most common pitch on residential roofs in areas with mild climates.

Answer 2

five-in-twelve
pg 361

Question 3

All rafters in _______ roofs run perpendicular to the nearest outside wall.

Answer 3

hip
pg 363

Question 4

The ________ roof consists of high gabled roof with a vertical wall above a downward-pitched shed roof section on either side.

Answer 4

lantern
pg 364

Question 5

This type of roof may be constructed with mono-pitched trusses, which employ on a single web member.

Answer 5

shed roof
pg 364

Question 6

_______ trusses are heavy-duty trusses with sloping ends.

Answer 6

bridge
pg 365

Question 7

The ______ mansard forms a slight hipped peak or ridge.

Answer 7

true
pg 365

Question 8

The ______ mansard has a flat central portion.

Answer 8

modern
pg 365

Question 9

Includes characteristics of both flat and pitched roofs: four steeply sloped sides rise to meet a flat top called a deck. This roof type may utilize bredge trusses or K-trusses as supporting members

Answer 9

modern mansard roof
pg 366

Question 10

A _______ roof is most often found on barns and other out-buildings.

Answer 10

gambrel
pg 366

Question 11

In the absence of a TIC, the first cut should be ____ to the ridge to help identify where the rafters are located.

Answer 11

parallel
pg 368

Question 12

Inverted roof differ from conventional flat roofs primarily in the location of their

Answer 12

main roof beams
pg 370

Question 13

In the ___________, the main roof joists are set at the level of the ceiling, and a framework of 2x4 members is constructed above the main joists.

Answer 13

inverted roofs
pg 370

Question 14

_________ roofs consist of bar joists or I-beams with brackets welded to the joists.

Answer 14

poured gypsum roofs
pg 374

Question 15

Gypsum board is placed on the brackets and is covered with a layer of gypsum cement up to ____ inches thick to which wire mesh reinforcement is added.

Answer 15

2 1/2
pg 374

Question 16

Some ________ roofs are actually only facades, each consisting of a wall (with a triangular cross section) that has been added to the perimeter of a flat roof for aesthetic reasons.

Answer 16

modern mansard
pg 374

Question 17

_________ are typically used to support roofs that must span large, open spaces, unsupported by pillars or posts.

Answer 17

arches
pg 379

Question 18

__________ can be made from plate girders or trusses.

Answer 18

steel arches
pg 379

Question 19

Typically, arches are spaced at ______ foot centers.

Answer 19

16 to 20
pg 379

Question 20

The top chords of these arches are usually laminated 2x12 inch or larger lumber. The purlins (usually 2x10) are covered by 1x6in or larger sheathing and composition roofing material.

Answer 20

bowstring truss roof
pg 380

Question 21

Steel tie rods are used instead of bottom chords for lateral support with turnbuckles to maintain proper tension.

Answer 21

bowstring arched roofs
pg 380

Question 22

The __________ roof uses massive arches of steel, concrete, or laminated wood buttressed into the ground at each end.

Answer 22

trussless arch
pg 382

Question 23

The _______- is another type of trussless arch made up of an interlocking geometric framework on which plank sheathing is laid.

Answer 23

Lamella roof
pg 382

Question 24

The framework is usually constructed of dimensional lumber in which 2x12 inch wooden members are bolted together at the intersections with steel gusset plates.

Answer 24

lamella arch roofs
pg 382

Question 25

When _____% of a lamella roof burns away, sudden failure of the remainder of the roof is likely.

Answer 25

10 to 20 pg 382

Question 25

Lateral support for _______ roofs is provided by exterior buttresses or internal tie rods with turnbuckles.

Answer 25

lamella pg 382

Question 26

__________ roof construction consists of laminated beams of various sizes- commonly 6x36 in - that span the length or width of the building.

Answer 26

panelized pg 383

Question 27

The most common types of roof trusses are:

Answer 27

parallel chord trusses; pitched roof trusses pg 385

Question 28

These trusses are designed with horizontal top and bottom chords that run parallel to each other.

Answer 28

parallel chord trusses pg 385

Question 29

The _______ effect of parallel chord trusses causes the top chord to always be in compression and the bottom chord in tension.

Answer 29

bridging pg 385

Question 30

Some parallel chord trusses are constructed of wooden components held together with sheet metal gusset plates also known as

Answer 30

gang nails pg 385

Question 31

Parallel chord trusses consist of wooden top and bottom chords that are cross-connected by web members made of steel tubing. The web members are usually made of 1 in cold-rolled steel tubing with the ends pressed flat.

Answer 31

wooden/ metal trusses pg 386

Question 32

These extremely strong assemblies often consist of top and bottom chords that are each made of two angle irons set in opposing directions.

Answer 32

bar joists pg 386

Question 33

Common pitched roof truss configurations are the

Answer 33

Howe, Pratt, and Fink trusses pg 387

Question 34

Some roof and floor assemblies are supported by prefabricated wooden beams that incorporate a solid piece of web material to connect the top and bottom chords. These assemblies are usually referred to as

Answer 34

engineered or wooden I-beams pg 388

Question 35

__________, are split from large blocks of wood, so their shape and thickness are not uniform.

Answer 35

wooden shakes pg 390

Question 36

_________ are sawn from large rectangular blocks of wood, so they tend to be uniform in shape and thickness.

Answer 36

wooden shingles pg 390

Question 37

Tar and gravel roof coverings (also called ______) are very common on flat or nearly flat roofs.

Answer 37

built-up roofs pg 392

Question 38

_________ roofs hold in heat and smoke, promote the development of flashover and backdraft conditions, impede ventilation efforts, and increase the chances of roof collapse due to the added weight.

Answer 38

steel-clad pg 395