Exam (elaborations)
GA Residential & Light Commercial Contractor III (1).
- Course
- NC Commercial Contractor
- Institution
- NC Commercial Contractor
GA Residential & Light Commercial Contractor III (1).
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GA Residential & Light Commercial Contractor IIIunified slab, turned down footing, thickened edge slab. consist of footing and floor slab formed
in one continous pour. minimum slab thickness is 3 1/2". bottom of footing at least 1' below
natural grade line and supported by solid, unfilled well drained soil. - ANS-monolithic slab
ground-supported slab; supported by foundation walls that extend below the frost line, the slab
is poured between the foundation walls. - ANS-independent slab
wire reinforcement should be placed toward the center of the slab using chairs as support.
Place One #5 or two #4 rebars in the middle third of the footings depth. - ANS-monlithic slab
reinforcement
Any fill should be compacted in _____ (layers of material uniform and fairly shallow) no more
than 6" deep compacting using a power tamper, hand tamper or rolling for a level subgrade.
follow with 2" subbase of gravel,slag, crushed stone and vapor retarder 6-mil polyethylene. -
ANS-Lifts
with a grade of more than 7% (7' rise in 100 lf) should not be covered in gravel, it will wash
away. use concrete or asphalt. crown drives slightly higher at the center. should be about 5"
thick using 2 x 6, use of 6x6 wire fabric reduces cracking. Expansion joints with asphalt
saturated felt strips every 40' and where drive meets other slabs. - ANS-driveways
4" thick, control joints (a jointing tool cuts a joint 3/4" deep perpendicular to the slab) every 4'
OC, expansion joinsts where walks meet drives or other slabs. when slopes are greater than
5%, a step is installed. the riser is sometimes formed by 2x6 and formed like an idividual slab. -
ANS-walks
________ a layer of living tissue that produces new wood called _______ along the inner
surface of a tree. new bark is created aong the cambium outer surface. The layers nearest the
center gradually turn into nonliving __________. - ANS-Cambian, sapwood, heartwood
when food and water are abundant, ______ ______ are wide. when dry spells or adverse
conditions, they are narrow. - ANS-growth rings
growth rings run across the boards width in a arch-like pattern. relatively inexpensive. produces
boards of greater width, 4 x 4 cut from middle core of log. - ANS-flat sawn lumber
premium wood. log is sawn into quarters, boards are then cut from the faces of each quarter.
growth rings run across the thickness to form angles of 60-90 degrees. Rift sawn boards have
end grain at 30-60 degree angles. - ANS-quarter sawn lumber
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