General Regulations Flashcards
Chapter 3 (24 cards)
Floor drains, sumps and sump pumps are permitted at the base of an elevator shaft, provided that they are __________.
Indirectly Connected
Maximum dimensions for openings in strainer plates on drain inlets?
1/2”
Any pipe that passes within ________ inches of the bottom of the footing or through a foundation wall shall be provided with a relieving arch, or a pipe sleeve.
12 inches
A sleeve shall be _______ pipe sizes greater than the pipe passing through the wall.
Two
Minimum insulation for water pipes?
R6.5
Minimum depth of water supply below grade?
6 inches below frost line and not less than 12 inches below grade
Minimum sewer depth below grade?
3 inches
Where trenches are excavated below the installation level of the pipe such that the bottom of the trench does. not form the bed for the pipe, the trench shall be backfilled to the installation level of the bottom of the pipe with ____________(1) in layers not greater than ____(2) inches in depth and such backfill shall be _________(3) after each placement.
(1) Sand or Fine Gravel
(2) 6 inches
(3) Compacted
Where rock is encountered in trenching, the rock shall be removed to not less than ____(1) inches below the installation level of the bottom of the pipe, and the trench shall be backfilled to the installation level of the bottom of the pipe with _______(2) tamped in place so as to provide uniform load-bearing support for the pipe between joints.
(1) 3 inches
(2) Sand
If soft materials of poor load-bearing quality are found at the bottom of the trench, stabilization shall be achieved by over-excavating not less than _________________(1) and backfilling to the installation level of the bottom of the pipe with __________(2), ____________(3) or a ______________(4) foundation.
(1) Two Pipe Diameters
(2) Fine Gravel
(3) Crushed Stone
(4) Concrete
When backfilling, loose earth shall be placed in the trench in ________(1) inch layers and tamped in place until the crown of the pipe is covered by ______(2) inches of tamped earth.
(1) 6 inch
(2) 12 inches
Trenching installed parallel to footings and walls shall not extend into the _____________(1) of a footing or wall. The upper boundary of the bearing plane is a line that extends downward, at an angle of ______(2) degrees from horizontal, from the outside bottom edge of the footing or wall.
(1) Bearing Plane
(2) 45 degrees
When should rigid support sway bracing be used?
At changes in direction greater than 45 degrees for pipe sizes 4 inches and larger.
For _________(1) pipe sizes greater than ________(2) inches, and other pipe sizes greater than ________(3) inches, restraints shall be provided for drain pipes at all changes in direction and at all changes in diameter greater than ________(4) pipe sizes.
(1) Plastic
(2) 6 inches
(3) 4 inches
(4) Two Pipe Sizes
On what page can you find a table for hanger spacing?
Page 18
Maximum hanger spacing for PVC pipe, both horizontal and vertical?
4 feet horizontal
10 feet vertical (sizes 2” and less require midway bracing)
Maximum hanger spacing for cast iron pipe, both horizontal and vertical?
5 feet horizontal (increased to 10 feet for 10 foot lengths of pipe)
15 feet vertical
Maximum hanger spacing for copper (1-1/4” and less), both horizontal and vertical?
6 feet horizontal
10 feet vertical
Maximum hanger spacing for copper (1-1/2” and larger), both horizontal and vertical?
10 feet horizontal
10 feet vertical
Maximum hanger spacing for PEX pipe, both horizontal and vertical?
32 inches horizontal
10 feet vertical (sizes 2” and less need a midway brace)
Maximum hanger spacing for CPVC pipe (1 inch and smaller), both horizontal and vertical?
3 feet horizontal
10 feet vertical (2” or less requires midway brace)
Maximum hanger spacing for CPVC pipe (1-1/4” and larger), both horizontal and vertical?
4 feet horizontal
10 feet vertical (2” and less requires a midway brace)
A minimum of a 3 foot head above the highest drainage fitting is permitted for one and two-family dwellings.
True or False
True
Except for testing under-slab piping systems.
For shower liners or pan tests, the floor and receptor area shall be filled wit water to a depth of not less than _____ inches measured at the threshold.
2 inches
