Glencoe: Section 59 Flashcards
Concrete for the floor slab and bearing wall footings should be made with
durable, well-graded aggregate.
Concrete for the floor slab and bearing wall footings should have a compression strength of at least
2500 psi
Concrete for the floor slab and bearing wall footings should be workable so that
it doesn’t develop large air pockets
One method of venting radon gas is from beneath
a slab, through a vent up to the roof
If necessary the proportion of X and Y should be adjusted to obtain a more workable concrete mix
fine and coarse aggregate
Concerete should not drop more than X’ to the ground as its delivered by a ready-mix truck because
4’
because large aggregate can settle unevenly.
After placing concrete, it should be
made to settle by vibrating, tamping, or spading.
Always discuss X with concrete truck operator before placing concrete
hand signals so he knows when to stop
basement concrete slabs are typically placed after
all improvements such as sewer and water lines have been connected
Basement floor slabs should be no less than X and should
3 1/2” thick and should slope towards a floor drain.
Screed
a long length of metal or wood that is used to strike off (level) the concrete.
How do you move the screed
pulled by hand and at the same time back and forth in a sawing motion.
Screed strips
guiding 1” pipes driven into subgrade to hold the screed level.
After the screed strips (pipes and stakes) have been removed
a float is then used to pack the concrete into any gaps
What is important in establishing a safe entry into the garage:
the grade, width, and radius of curves in a driveway.
Driveways that have a grade more than X percent (X” rise in 100 lineal feet) should not be covered with gravel because
7% (7” rise in 100 lineal feet)
the gravel will gradually wash away.
Driveways that have a grade more than 7 percent, X is used instead of gravel
concrete or asphalt