Storm Drainage Systems Flashcards
7 cards from real IPC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Storm Drainage Systems flashcards as text
Per the IPC, what minimum slope is required for horizontal storm drain piping that is 3 inches or smaller in diameter?
Answer: 1/4 inch per foot
The IPC requires a minimum slope of 1/4 inch per foot for horizontal storm drain piping 3 inches or smaller in diameter to ensure adequate flow velocity.
According to the IPC, what is a 'conductor' in storm drainage terminology?
Answer: A pipe inside a building that conveys storm water from the roof drain to the building storm drain
A conductor is the vertical pipe located inside a building that carries storm water downward from the roof drain to the building storm drain.
The IPC requires that roof drain strainers have a total inlet area of not less than:
Answer: 1.5 times the area of the conductor pipe
IPC Section 1102.4 requires roof drain strainers to have a total inlet area not less than 1.5 times the cross-sectional area of the conductor to prevent flow restriction.
Per the IPC, secondary (emergency) roof drainage systems are required when:
Answer: Overflow from blocked primary drains could cause structural damage or flooding of occupied areas
The IPC requires secondary roof drainage where overflow from blocked primary drains poses a risk of structural damage or flooding of occupied building spaces.
Under the IPC, 'area drains' are receptors designed to collect storm water from:
Answer: Exterior paved areas, courts, and similar surfaces
Area drains are installed to collect and remove storm water from exterior paved or landscaped surfaces such as parking lots, driveways, and courtyards.
Per the IPC, the design rainfall intensity used for sizing storm drainage systems must be based on:
Answer: Rainfall data specific to the geographical location of the project
The IPC requires storm drainage to be sized using rainfall intensity data specific to the project location, typically from the code appendix tables.
What is a 'leader' in IPC storm drainage terminology?
Answer: An exterior vertical pipe or element that conveys storm water from the roof to the storm drain or grade
A leader (commonly called a downspout) is an exterior vertical pipe that carries storm water from the roof down to the storm drain or to grade level.