I Line Flashcards
what are the three fire rating classes of shingles?
Class A, B, and C
what has the highest fire rating?
Class A
what is the lowest slope ash fault shingles usually go too?
2:12
how are ash fault shingles bound together?
by a strip of adhesive on the back that activates in the sun
what are most ash fault shingles today?
laminated shingles (architectural shingles)
what materials can the base matt of shingles be?
organic or fibreglass
what is the difference between cedar shakes and cedar shingles?
shingles are sawn on both faces where shakes a split on both faces
a square of ash fault shingles will cover how many square feet?
100 ft squared
what slope can wood shingles and shakes be installed?
3:12 and steeper
what is classified as built up roofing?
hot tar, gravel roof
what 2 basic types of metal roof coverings are there?
sheet metal and shingles
finishes of sheet metal are usually?
backed enamel or vinyl plastic
what does it mean to “work” the screws?
the metal will expand and contract eventually causing leaks
what is a type of roofing that has hidden fasteners?
a standing seam roof
which tile roof is long lasting and fireproof?
clay and concrete
how do you cut concrete tiles?
with a diamond blade and a circular saw
what tile is like a natural stone?
slate
where are the areas that flashing should be installed?
valleys, where roof meet walls the rise above the roof, and around skylights and chimneys
how wide is a drip edge?
12mm (1/2”)
where is a drip edge located?
under the first row of roofing that hangs over the facia
what does an under course consist of?
required for ash fault shingles, under course is an upside down layer of shingles that is fully covered by the first course of exposed shingles.
what is the minimum lap for head lap?
2 inches
what is a head lap?
the distance from the bottom edge of an overlapping shingle to the top of a shingle 2 courses under, measured op the slope (2” min)
what is minimum nail spacing for starter strip?
12 inches OC
ho for does eve protection have to be up the roof?
36 inches
shat is a starter strip?
12 inch wide roll of roofing or shingles
what is a course
a horizontal row of shingles or roofing
what is a shingle butt?
the bottom exposed edge of the shingle
what is a square of roofing?
the amount of roofing required to cover 100 square feet
where are ice and water shields mostly used?
troubled spots like along the eves, in valleys, and in unique areas where leaks are more likely.
min overlap for step flashing?
3 inches
what’s the difference between open valley and closed valley?
an open valley is where the flashing is exposed and a closed valley is where the shingles protect the flashing
what is the piece of flashing called on the lower side of the slope of a chimney?
an apron
how do you flash down the sides of the chimney?
with a step flashing method
what can be used for a flashing system against a wall on a roof?
a can’t strip, counter flashing and a reglet in the wall
what is laminate laid on?
has a foam back or on a 3mm thick underlay of closed cell foam
because the finished floor is not bonded or fastened to the subfloor, this type of flooring is called what?
a floating floor
what is the min time for the moisture content in flooring to stabilize?
72 hours
what are some reasons why sleepers are used?
to nail in place finished flooring or subflooing, level rough concrete floors, to provide a cushioned floor, to install insulation below floor
how do you fasten sleepers to concrete floors?
with powder actuated fasteners penetrating 25mm into concrete
what is the best way to level sleepers?
wit a layer level and with shims under the sleepers
the layout of wood strip floors begins where?
parallel to the longest wall
how much room should be left for expansion against the wall?
1/2 inch min against each wall
what 2 ways can wood strip flooring be fastened?
face nailed, or blind nailed
how are wooden flooring tiles fastened?
glued to the subfloor using latex adhesive
what does a spline do?
connect 2 flooring strips back to back (groove to groove)
where should you nail the base shoe?
into the base board allowing the flooring to expand and contract
what is Latex-modified cement mortar for?
installing ceramic tile
what amount of gap is left between sleepers and the wall?
3/4 inch
why is wood strip flooring made with an undercut on the bottom?
the groove or undercut is used to help keep the boards from warping and allow them to sit flat on the subfloor
where does resilient flooring get its name?
from its flexibility
how are most resilient floors fastened?
applied to the subfloor with adhesive or is a peel-and-stick type
what is the difference between ceramic and porcelain?
They are the same except porcelain tiles have much denser porcelain clay dust.
why is the bulge of a drywall screw rounded?
to reduce tearing of the paper face
what are the three keys needed for installing board?
minimum joints, fully fastened, and without surface defects
what is the sequence of installing board?
install the ceiling first then install the walls from the top down
what are ways of marking where plugs or cabinet backing is?
marking on the floor or video recording
when does the drywall get fastened to top and bottom plates?
when the drywall is part of a braced wall panel or a fire-rated assembly
why should ceiling board be fastened 12 inches from the wall?
to create a floating corner, truss uplift will occur but the board will still be joined to the wall board and not crack
what size gap can be left when fitting around doors and windows?
1/2 inch
how much room do you have to cut out electrical boxes?
1/8th because most face plates cover 1/4 inch
what is a steel stud crimper used for?
designed to attach a metal stud rigidly to a metal track
what can be done if steel stud wall heights exceed 2.4 meters?
3/4 or 1 1/2 wide channel stock can be used to stiffen the walls
what is used to cut steel stud material?
aviation shears
what 2 proposes are for punch-outs in steel studs?
allow electrical to pass through and permit the addition of channel stiffeners.
what is deflection space and how much?
space between stud end and track base and 12 mm
what steel stud fastening is meant for load bearing?
screws
what gauges of steel stud is for non load bearing?
25, 22, 20, 18
what gauges of steel stud is for load bearing?
16, 14, 12
what are standard flange sizes?
typically 30mm and 32mm
what are eyelets?
used to attach the hanger wire to the overhead supports
what is the main support for the grid system?
the main Tee or Main Beam, hanger wire every 4 feet
what are cross Tees?
they span between main Tees, ether 2 feet or 4 feet in length
vent grills and light fixtures must what in suspended ceilings?
supported independently by their own hangers
where are slots on 4’ cross tees?
on at the mid point (2’)
where are the slots on a main Tee?
3 inches from the end and every 6 inches
