2196_001.pdfCHAP'EH 11
STORM DRAINAGE
1101.0 General.
1101.1 Applicability. This chapter shall govern the mate-
rials, design, and installation ofstorm water drainage
systems.
ii 1101.2 Where Required. hoofs, paved areas, yards,
courts, courtyards, vent shafts, light wells, or similar areas
having rainwater, shall be drained into a separate storm
sewer system, or into a combined sewer systeara where a
;separate storm sewer system is not available, or to some
other place of disposal satisfactory to the Authority Having
Judsdiction. In the case of one- and two-family dwelling$,,
storm water shall be permitted to be discharged on flat
areas, such as streets or lawns, so long as the storm water
shall flow away from the building and away from adjoining
property, and shall not create a nuisance.
ii 1101.3 Storm Water Drainage to Sanitary Sewer
Prohibited. Storm water shall not be drained into sewers
intended for sanitary drainage.
1101.4 Material Uses. Pipe, tube, an(] fittings conveying
rainwater shall be of such materials and design as to
perform their intended llrnction to the satisfaction of the
Authority Having Jurisdiction, Conductors within a vent or -
shaft shall be of cast-iron, galvanized steel, wrought iron.,
copper, copper alloy, lead, Schedule 40 ABS DWV,
Schedule 40 PVC DWV, stainless steel 304 or 316L [stain-
less steel 304 pipe and fittings shall not be installed under-
ground and shall be kept not less than 6 inches (152 rrun)
aboveground]„ or other approved niaterizals, and changes in.
direction shall be in accordance with the requirements of
Section 706.0. ABS and PVC DWV piping installations
shall be installed in accordance with Chapter 14 "Firestop
Protection." Except for individual single-family dwelling
units, materials exposed within ducts or plenums shall have
a flame -spread index of not more than 25 and a smoke
developed index of not more than 50, where tested in accor-
dance with ASTM E84 or UL 723.
1101.4.1 Copper and Copper Alloys. Joints and
connections in copper and copper alloy pipe and tube
shall be installed in accordance with Section 705.3.
1101.4.2 Conductors. Conductors installed above-
ground in buildings shall be in accordance with the
applicable standards referenced in Table 701.2 for
aboveground drain, waste, and vent pipe. Conductors
installed aboveground level shall be of seamless copper
water tube, Type K, L, or M; Schedule 40 copper pipe
or Schedule 40 copper alloy pipe; Type DWV copper
drainage tube; service weight cast-iron soil pipe or
harbless cast-iron soil pipe; standard weight galvanized
steel pipe; stainless steel 304 or 316L [stainless steel
304 pipe and fittings shall not be installed underground
and shall be kept not less than 6 inches (152 mm)
aboveground]; or Schedule 40 ABS or Schedule 40
PVC plastic pipe.
1101.4.3 Leaders. Leaders installed outside shall be (<
in accordance with the applicable standards referenced
in Table 701.2 for aboveground drain, waste, and vent
pipe; aluminum sheet metal; galvanized steel sheet
metal; or copper sheet metal.
1101.4.4 Underground Building Storm Drains. <<
Underground building storm drains shall comply with
the applicable standards referenced in Table 701.2 for
underground drain, waste, and vent pipe.
1101.4.5 Building Storm Sewers. Building storm 0
sewers shall comply with the applicable standards
referenced in Table 701.2 for building sewer pipe.
1101.4.6 Subsoil Drains. Subsoil drains shall be <<
open jointed, perforated, or both and constructed of
materials in accordance with Table 1101.4.6.
Vitrified
y ( strength) a ASTM C4, ASTM C700
I - - ClaExtra stre µ ..., F __.
1101.5 Expansion Joints Required. Expansion joints <<
or sleeves shall be provided where warranted by tempera-
ture variations or physical conditions.
1101.6 Subsoil Drains. Subsoil drains shall be provided <<
around the perimeter of buildings having basements,
cellars, crawl spaces, or floors below grade. Such subsoil
drains shall be permitted to be positioned inside or outside
of the footing, shall be of perforated or open -jointed
approved drain tile or pipe, not less than 3 inches (lit) mm)
in diameter, and shall be laid in gravel, slag, crushed rock,
approved r/4 of an inch (19.1 anrn) crushed, recycled glass
aggregate, or other approved porous material with not less
than 4 inches (102 nw,m) surrounding the pipe. filter media
shall be provided for exterior subsoil piping.
1101.6.1 Discharge. Subsoil drains shall be piped to
a storm drain, to an approved water course, to the front
street curb or gutter, to an alley, or the discharge from
the subsoil drains shall be conveyed to the alley by a
concrete gutter. Where a continuously flowing spring
or groundwater is encountered, subsoil drains shall be
piped to a storm drain or an approved water course.
1101.6.2 Sump. Where it is not possible to convey 0
the drainage by gravity, subsoil drains shall discharge
to an accessible sump provided with an approved auto-
matic electric pump. The sump shall be not less than 15
inches (381 mm) in diameter, 18 inches (457 mm) in
depth, and provided with a fitted cover. The sump
pump shall have an adequate capacity to discharge
2015 UNIFORM PLUMBING CODE 153
FOUNDATIONS
TABLE R404.2.3
PLYWOOD GRADE
AND THICKNESS FOR
WOOD FOUNDATION
CONSTRUCTION
(30 pcf equivalent
-fluid weight
soil pressure)
FACE
GRAIN ACROSS STUDS
FACE
GRAIN PARALLEL TO
STUDS
HEIGHT OF FILL
(inches)
STUD SPACING
(inches) Grade'
Minimum thickness
Span rating
Grade'
Minimum thickness
S pan rating
(inches)
(inches?,*
A
15/3z
32/16
12 B
15/32
32/16
B
15/32 c
32/16
24
A15/32C
32/16
16 B
15/
32
32/16
',.
B
19/32C (4, 5 ply)
40/20
A
15/32
32/16
12 B
15/32
32/16
B
15/32C (4, 5 ply)
32/16
36
B
19/32 (4, 5 ply)
40/20
A19/3z
40/20
16 B
15/32C
1 32/16
B
/32
48/24
A
15/32c
32/16
12 B
15/32
32/16
B
i9/3z (4, 5 ply)
40/20
48
A
19/C
40/20
16 B
19/32
40/20
A
z, 32 2
48/24
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per cubic foot = 0.1572 kN/m'.
a. Plywood shall be of the following minimum grades in accordance with DOC PS 1 or DOC PS 2:
1. DOC PS 1 Plywood grades marked:
1.1. Structural I C-D (Exposure 1).
1.2. C-D (Exposure 1).
2. DOC PS 2 Plywood grades marked:
2.1. Structural I Sheathing (Exposure 1).
2.2. Sheathing (Exposure 1).
3. Where a major portion of the wall is exposed above ground and a better appearance is desired, the following plywood grades marked exterior are suitable:
3.1. Structural I A-C, Structural I B-C or Structural I C-C (Plugged) in accordance with DOC PS 1.
3.2. A-C Group 1, B-C Group 1, C-C (Plugged) Group 1 or MDO Group 1 in accordance with DOC PS 1.
3.3. Single Floor in accordance with DOC PS 1 or DOC PS 2.
b. Minimum thickness 15/32 inch, except crawl space sheathing shall have not less than 3/, inch for face grain across studs 16 inches on center and maximum 2-foot
depth of unequal fill.
c. For this fill height, thickness and grade combination, panels that are continuous over less than three spans (across less than three stud spacings) require
blocking 16 inches above the bottom plate. Offset adjacent blocks and fasten through studs with two 16d corrosion -resistant nails at each end.
SECTION R405
FOUNDATION DRAINAGE
R405.1 Concrete or masonry foundations. Drains shall be
provided around concrete or masonry foundations that retain
earth and enclose habitable or usable spaces located below
grade. Drainage tiles, gravel or crushed stone drains, perfo-
rated pipe or other approved systems or materials shall be
installed at or below the area to be protected and shall dis-
charge by gravity or mechanical means into an approved
drainage system. Gravel or crushed stone drains shall extend
not less than 1 foot (305 mm) beyond the outside edge of the
footing and 6 inches (152 mm) above the top of the footing and
be covered with an approved filter membrane material. The
top of open joints of drain tiles shall be protected with strips of
building paper. Except where otherwise recommended by the
drain manufacturer, perforated drains shall be surrounded with
an approved filter membrane or the filter membrane shall
cover the washed gravel or crushed rock covering the drain.
Drainage tiles or perforated pipe shall be placed on a minimum
of 2 inches (51 mm) of washed gravel or crushed rock not less
than one sieve size larger than the tile joint opening or perfo-
ration and covered with not less than 6 inches (152 mm) of the
same material.
Exception: A drainage system is not required where the
foundation is installed on well -drained ground or sand -
gravel mixture soils according to the Unified Soil Classifi-
cation System, Group I soils, as detailed in Table R405.1.
R405.1.1 Precast concrete foundation. Precast concrete
walls that retain earth and enclose habitable or useable
space located below -grade that rest on crushed stone foot-
ings shall have a perforated drainage pipe installed below
the base of the wall on either the interior or exterior side of
the wall, not less than 1 foot (305 mm) beyond the edge of
the wall. If the exterior drainage pipe is used, an approved
filter membrane material shall cover the pipe. The drain-
age system shall discharge into an approved sewer system
or to daylight.
R405.2 Wood foundations. Wood foundations enclosing
habitable or usable spaces located below grade shall be ade-
quately drained in accordance with Sections R405.2.1
through R405.2.3.
R405.2.1 Base. A porous layer of gravel, crushed stone or
coarse sand shall be placed to a minimum thickness of 4
inches (102 mm) under the basement floor. Provision shall
be made for automatic draining of this layer and the gravel
or crushed stone wall footings.
R405.2.2 Vapor retarder. A 6-mil-thick (0.15 mm) poly-
ethylene vapor retarder shall be applied over the porous
2015 INTERNATIONAL RESIDENTIAL CODE® 119
Page 1 of 1
CONCRETF FOUIVWON WALL
FOUNDATION DAMP PROOFING
pai a Y +�
a.
1 0,4,��
iw%