Transcript Slide 1
Technology in Architecture
Lecture 15
Waste & Vent Systems
Waste & Vent Sizing Procedure
Bathroom Design
Waste & Vent Systems
Fundamentals
Siphon action
can drain water
Trap blocks
sewer gas
Vent breaks
siphon
S: p. 1006, F.22.8
Air Gaps
Eliminate the potential for cross contamination
S: p. 1009, F.22.11
Vents and Stacks
Individual vents
Circuit vents
Soil stack
Vent stack
Stack vent
“Wet stack”
Vent through
roof (VTR)
S: p. 1008, F.22.10
Note: Drain fittings are 45º
Drains & Sewers
House drain
House sewer
Storm drain
Clean outs
House traps
Fresh air inlet
S: p. 1007, F.22.9
Note: Drain fittings are 45º
Waste & Vent Sizing Procedure
1. Identify waste & soil locations
Clusters are more
efficient
S: p. 1014, F.22.17
2. Layout system
vertically & horizontally
Grouped fixtures can
be stacked in a
vertical riser
S: p. 1027, F.22.31
3. Size Traps
Trap size is used
when connecting
to main
S: p. 1017, T.22.2
4. Calculate
Drainage Fixture
Units (DFU)
Pipe sizes based
on DFU
S: p. 1017, T.22.2.2
5. Determine loads
Fixture location
may control size
S: p. 1022,
F.22.24
6. Determine slope and size of
horizontal drains
Slope may be
constrained by
depth of floor
cavity
S: p. 1020, T.22.5
7. Verify maximum vent length
Measured from
plans
S: p. 1022,
F.22.24
8. Size vents according to
DFU and length
Calculate for each
vent load and
developed length
S: p. 1019, T.22.4
9. Verify space requirements and
adjust design
Common adjustments
“Wet” walls 6” cavity
Slope and ceiling exposure
Cleanout access
Bathroom Design
Design Considerations
ADA compliance
ANSI Standard A117.1 1986
Wheel chair access
Grab bars
Counter top/fixture heights
Visual privacy
Acoustical privacy