Chapter 7 Flashcards
What are the six types of wood framed construction.
Log Cabin Post and Frame Balloon Frame Platform Frame Plank and Beam Truss Frame
Balloon frame construction started in ___.
1833
___ stories are typically the limit for platform-frame construction.
3 stories
There is one common vertical means of fire spread in both balloon frame and platform frame buildings: the ___.
Open stairwell
Floor joists in platform frame are usually spaced ___ or ___ inches on center.
16” or 24”
Platform frame… wood walls, consisting of studs spaced ___ on center.
16”
The Empire State building weighs ___ pounds per cubic foot.
23
Modern high-rises weight as little as ___ pounds per cubic foot.
8
Gusset plates, also known as gang nails, contain a series of small ___ inch teeth.
3/8”
Truss roofs lack the ___ that is present in legacy construction.
Ridge pole
CO… ___ ppm can be fatal after a few breaths.
12,500 ppm
The flammability range of CO is from ___ to ___ %.
12.5% to 74%
The ignition temp of CO is ___.
1,128°F
Wooden I-beams are manufactured in lengths up to ___.
60 feet
Recent tests of wooden I-beams have shown failure in just over ___ minutes.
6 minutes
Fire stops typically limit ___ movement.
Vertical
Fire stopping material may consist of at least ___ inch nominal lumber, two thicknesses of ___ inch nominal lumber with broken up lap joints, or ___ in plywood.
2 inch
1 inch
23/32”
Draft stops, in contrast to fire stops, limit ___ movement.
Horizontal
Draft stopping may consist of at least ___ gypsum board, ___ plywood, _____, or other approved materials, usually applied parallel to the main framing members.
1/2” gyp
3/8” ply
Sheet metal
UL subjects pressure treated wood to a test for ___ instead of the usual 10 minutes.
30 min
Construction in which plywood provides some of the structural strength of the building, particularly in providing resistance to shear stresses, is often described as ___ or ___.
“stressed skin”
“diaphragm”
Plank like sections of nominal 2 inch boards are glued together under pressure to produce large arches, beams, girders, and columns… Such timbers are known as ___ or ___, a trade name.
Laminated timbers
“Glulam”
___ is often a misused generic name for any low density fiberboard.
Celotex
Plywood siding, sometimes referred to as ___ plywood, a trademark of the APE-Engineered Wood Association, is delivered in 4 foot wide sheets, side matched.
“T1-11”
Longer, thicker shingles are called ___.
Shakes
Siding… ___ can explode when heated.
Asbestos cement shingles
Bricks laid with the ends showing are called ___. In a bearing wall, they can be seen usually every ___ rows.
Headers
Seventh
