Storm Drainage System Flashcards
a pipe connected from bldg gutter to the downspout on conductor
LEADER
a vertical pipe to convey rainwater
CONDUCTOR OR DOWNSPOUT
a vertical pipe to convey rainwater
CONDUCTOR OR DOWNSPOUT
receptacle in which liquids are retained for sufficient period of time to allow settleable material to deposit
CATCHBASIN
pipeline from the bldg to public or storm drainage
HOUSE STORM SEWER
runs off over the earth surface after a storm
STORM WATER
Type of water that stands in or passes through the ground
GROUND WATER
runs off over the surface of the ground
SURFACE WATER
What materials should rainwater downspout or conductor pipe within the interior of the bldg inside a pipe chase be made of?
Cast Iron
galvanized steel
iron
brass
copper
lead
schedule 40 ABS DWV
Series 1000 PVC DWV
what is the material of rainwater downspout on conductor on the exterior side?
Gauge 21 Galvanized sheet metal
What is the material at the bottom of the conductor draining over the catchbasin as protection from damage?
Steel pipe or Cast Iron Pipe
What is the material for rainwater piping located within a medium height bldg?
Galvanized Iron Pipe Schedule 30
Cast Iron soil pipe SV type
copper tube DWV type
schedule 40 ABS DWV
Series 1000 PVC DWV
Downspouts for high-rise bldgs shall resist _______installed within the pipe chase
high hydrostatic pressure
What are approved roof drain material?
Cast iron
copper
other corrosion-resistant material
what is the minimum ht extension of strainers above the surface of the roof?
102 mm
What is the minimum area of dome-type strainers times the area of the outlet pipe?
1-1/2 times (1.5 times)
What is the minimum area of flat-surface type roof deck strainers for use on sun decks, parking decks, times the area of the outlet pipe?
2 times
What is the material for roof drains passing through roof into the interior of a bldg?
cast iron drain with integrally-cast water-Stop ring around the outside of the body
What is the joinery of outlet connections of strainers?
inside-caulked or female screwed
Vertical rainwater shall be sized based on maximum depth in mm or _______
rainfall per hour
What is the rainfall intensity used in Manila?
102 mm/hr
What is the computation for rainwater pipe sizing with 1 wall?
Roof Area +50% of wall area
What is the computation for rainwater pipe sizing with 2 adjacent walls?
Roof Area + 35% wall areas
What is the computation for rainwater pipe sizing with 2 walls opposite each other and of same heights?
0%
What is the computation for rainwater pipe sizing with 2 wall opposite of differing hts?
Roof Area +50% of wall area above top of lower wall
What is the multiplier for finding the depth of equivalent area of rectangular gutter?
0.392
What is the multiplier for finding the width of equivalent area of rectangular gutter?
0.8862
