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CHAPTER 11
STORM DRAINAGE
SECTION 1101
GENERAL
1101.1 Scope. The provisions of this chapter shall govern the
materials, design, construction and installation of storm drain-
age.
1101.2 Where required. All roofs, paved areas, yards, courts
and courtyards shall drain into a separate storm sewer system,
or a combined sewer system, or to an approved place of dis-
posal. For one- and two-family dwellings, and where approved,
storm water is permitted to discharge onto flat areas, such as
streets or lawns, provided that the storm water flows away from
the building.
1101.3 Prohibited drainage. Storm water shall not be drained
into sewers intended for sewage only.
1101.4 Tests. The conductors and the building storm drain shall
be tested in accordance with Section 312.
1101.5 Continuous flow. The size of a drainage pipe shall not
be reduced in the direction of flow.
1101.6 Fittings and connections. All connections and changes
in direction of the storm drainage system shall be made with ap-
proved drainage -type fittings in accordance with Table 706.3.
The fittings shall not obstruct or retard flow in the system.
1101.7 Roof design. Roofs shall be designed for the maximum
possible depth of water that will pond thereon as determined by
the relative levels of roof deck and overflow weirs, scuppers,
edges or serviceable drains in combination with the deflected
structural elements. In determining the maximum possible
depth of water, all primary roof drainage means shall be as-
sumed to be blocked.
1101.8 Cleanouts required. Cleanouts shall be installed in the
storm drainage system and shall comply with the provisions of
this code for sanitary drainage pipe cleanouts.
Exception: Subsurface drainage system.
1101.9 Backwater valves. Backwater valves installed in a
storm drainage system shall conform to Section 715.
SECTION 1102
MATERIALS
1102.1 General. The materials and methods utilized for the
construction and installation of storm drainage systems shall
comply with this section and the applicable provisions of
Chapter 7.
1102.2 Inside storm drainage conductors. Inside storm
drainage conductors installed above ground shall conform to
one of the standards listed in Table 702.1.
1102.3 Underground building storm drain pipe. Under-
ground building storm drain pipe shall conform to one of the
standards listed in Table 702.2.
1102.4 Building storm sewer pipe. Building storm sewer pipe
shall conform to one of the standards listed in Table 1102.4.
TABLE 1102.4
BUILDING STORM SEWER PIPE
MATERIAL
STANDARD
Acrylonitrile butadiene styrene
ASTM D 2661; ASTM D 2751;
(ABS) plastic pipe
ASTM F 628
Asbestos -cement pipe
ASTM C 428
Polyvinyl chloride (PVC)
Plastic pipe (type sewer pipe,
PS25, PS50 or PSI 00)
ASTM A 74; ASTM A 888;
Cast-iron pipe
CISPI 301
Stainless steel drainage systems,
Type 316L
ASTM C 14; ASTM C 76;
Concrete pipe
CAN/CSA A257.1M;
CAN/CSA A257.2M
Copper or copper -alloy tubing
ASTM B 75; ASTM B 88;
(Type K, L, M or DWV)
ASTM B 251; ASTM B 306
Polyvinyl chloride (PVC)
ASTM D 2665; ASTM D 3034;
plastic pipe (Type DWV,
ASTM F 891; CSA -13 182.2;
SDR26, SDR35, SDR41,
CAN/CSA-B182.4
PS50 or PS 100)
Vitrified clay pipe
ASTM C 4; ASTM C 700
Stainless steel drainage systems,
ASME A112.3.1
Type 316L
1102.5 Subsoil drain pipe. Subsoil drains shall be
open jointed, horizontally split or perforated pipe conforming
to one of the standards listed in Table 1102.5.
TABLE 1102.5
SUBSOIL DRAIN PIPE
MATERIAL
STANDARD
Asbestos -cement pipe
ASTM C 508
Cast-iron pipe
ASTM A 74; ASTM A 888;
CISPI 301
Polyethylene (PE) plastic pipe
ASTM F 405
Polyvinyl chloride (PVC)
Plastic pipe (type sewer pipe,
PS25, PS50 or PSI 00)
ASTM D 2729; ASTM F 891;
CSA -13 182.2;
CAN/CSA-B 182.4
Vitrified clay pipe
ASTM C 4; ASTM C 700
Stainless steel drainage systems,
Type 316L
ASME A 112.3.1
1102.6 Roof drains. Roof drains shall conform to ASME
AI 12.21.2M or ASME A112.3.1.
1102.7 Fittings. Pipe fittings shall be approved for installation
with the piping material installed, and shall conform to the re-
spective pipe standards or one of the standards listed in Table
1102.7. The fittings shall not have ledges, shoulders or reduc-
FLORIDA BUILDING CODE — PLUMBING 11.1
STORM DRAINAGE
tions capable of retarding or obstructing flow in the piping.
Threaded drainage pipe fittings shall be of the recessed drain-
age type.
TABLE 1102.7
PIPE FITTINGS
MATERIAL
STANDARD
Acrylonitrile butadiene styrene
ASTM D 2468; ASTM D 2661
(ABS) plastic
ASME B 16.4; ASME B 16.12;
Cast-iron
ASTM A 888; CISPI 301;
ASTM A 74
Chlorinated polyvinyl chloride
ASTM F 437; ASTM F 438;
(CPVC) plastic
ASTM F 439
ASME B 16.15; ASME B 16.18;
Copper or copper alloy
ASME B 16.22; ASME B 16.23;
ASME B 16.26; ASME B 16.29
Gray iron and ductile iron
AWWA C110
Malleable iron
ASME B 16.3
Plastic, general
ASTM F 409
Polyethylene (PE) plastic
ASTM D 2609
Polyvinyl chloride (PVC)
ASTM D 2464; ASTM D 2466;
plastic
ASTM D 2467; CSA -13 137.2;
ASTM D 2665; ASTM F 1866
Steel
ASME B 16.9; ASME B 16.11;
ASME B 16.28
Stainless steel drainage
Systems, Type 316L
ASME A 112.3.1
SECTION 1103
TRAPS
1103.1 Main trap. Leaders and storm drains connected to a
combined sewer shall be trapped. Individual storm water traps
shall be installed on the storm water drain branch serving each
conductor, or a single trap shall be installed in the main storm
drain just before its connection with the combined building
sewer or the public sewer.
1103.2 Material. Storm water traps shall be of the same mate-
rial as the piping system to which they are attached.
1103.3 Size. Traps for individual conductors shall be the same
size as the horizontal drain to which they are connected.
1103.4 Cleanout. An accessible cleanout shall be installed on
the building side of the trap.
SECTION 1104
CONDUCTORS AND CONNECTIONS
1104.1 Prohibited use. Conductor pipes shall not be used as
soil, waste or vent pipes, and soil, waste or vent pipes shall not
be used as conductors.
1104.2 Combining storm with sanitary drainage. The sani-
tary and storm drainage systems of a structure shall be entirely
separate except where combined sewer systems are utilized.
Where a combined sewer is utilized, the building storm drain
shall be connected in the same horizontal plane through a sin-
gle-wye fitting to the combined sewer at least 10 feet (3048
mm) downstream from any soil stack.
1104.3 Floor drains. Floor drains shall not be connected to a
storm drain.
SECTION 1105
ROOF DRAINS
1105.1 Strainers. Roof drains shall have strainers extending
not less than 4 inches (102 mm) above the surface of the roof
immediately adjacent to the roof drain. Strainers shall have an
available inlet area, above roof level, of not less than one and
one-half times the area of the conductor or leader to which the
drain is connected.
1105.2 Flat decks. Roof drain strainers for use on sun decks,
parking decks and similar areas that are normally serviced and
maintained shall comply with Section 1105.1 or shall be of the
flat -surface type, installed level with the deck, with an avail-
able inlet area not less than two times the area of the conductor
or leader to which the drain is connected.
1105.3 Roof drain flashings. The connection between roofs
and roof drains which pass through the roof and into the interior
of the building shall be made water tight by the use of approved
flashing material.
SECTION 1106
SIZE OF CONDUCTORS, LEADERS
AND STORM DRAINS
1106.1 General. The size of the vertical conductors and lead-
ers, building storm drains, building storm sewers, and any hori-
zontal branches of such drains or sewers shall be based on the
100 -year hourly rainfall rate indicated in Figure 1106.1 or on
other rainfall rates determined from approved local weather
data.
1106.2 Vertical conductors and leaders. Vertical conductors
and leaders shall be sized for the maximum projected roof area,
in accordance with Table 11067.7—
1106.3 Building storm drains and sewers. The size of the
building storm drain, building storm sewer and their horizontal
branches having a slope of one-half unit or less vertical in 12
units horizontal (4 -percent slope) shall be based on the maxi-
mum projected roof area in accordance with Table 1106.3. The
minimum slope of horizontal branches shall be one-eighth unit
vertical in 12 units horizontal (1 -percent slope) unless other-
wise approved.
1106.4 Vertical walls. In sizing roof drains and storm drainage
piping, one-half of the area of any vertical wall that diverts rain-
water to the roof shall be added to the projected roof area for in-
clusion in calculating the required size of vertical 'conductors,
leaders and horizontal storm drainage piping.
1106.5 Parapet wall scupper location. Parapet wall roof
drainage scupper and overflow scupper location shall comply
with the requirements of the Florida Fire Prevention Code.
11.2 FLORIDA BUILDING CODE — PLUMBING
STORM DRAINAGE
FIGURE 1106.1
100 -YEAR, 1 -HOUR RAINFALL (INCHES) EASTERN UNITED STATES
For SI: I inch = 25.4 mm.
Source: National Weather Service, National Oceanic and Atmospheric Administration, Washington D.C.
FLORIDA BUILDING CODE — PLUMBING 11.3
STORM DRAINAGE
FIGURE 1106.1—continued
100 -YEAR, 1 -HOUR RAINFALL (INCHES) CENTRAL UNITED STATES
For SI: I inch = 25.4 mm.
Source: National Weather Service, National Oceanic and Atmospheric Administration, Washington D.C.
2.75
11,4 FLORIDA BUILDING CODE — PLUMBING
STORM DRAINAGE
M.1
FIGURE 1106.1—continued
100 -YEAR, 1 -HOUR RAINFALL (INCHES) WESTERN UNITED STATES
For SI: 1 inch = 25.4 mm.
Source: National Weather Service, National Oceanic and Atmospheric Administration, Washington D.C.
FLORIDA BUILDING CODE — PLUMBING 11.5
STORM DRAINAGE
170- 175- 180.
176' 170' 166' 160- 155- 15D* 146- M. 135' 130'
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730
FIGURE 1106.1—continued
100 -YEAR, 1 -HOUR RAINFALL (INCHES) ALASKA
For SL I inch = 25.4 mm.
Source: National Weather Service, National Oceanic and Atmospheric Administration, Washington D.C.
11.6 FLORIDA BUILDING CODE — PLUMBING
STORM DRAINAGE
FIGURE 1106.1 --continued
100 -YEAR, 1 -HOUR RAINFALL (INCHES) HAWAII
For SI: 1 inch = 25.4 mm.
Source: National Weather Service, National Oceanic and Atmospheric Administration, Washington D.C.
a
x
z
FLORIDA BUILDING CODE — PLUMBING 11.7
STORM DRAINAGE
FIGURE 1106.1 --continued
100 -YEAR, 1 -HOUR RAINFALL (INCHES) HAWAII
For SI: 1 inch = 25.4 mm.
Source: National Weather Service, National Oceanic and Atmospheric Administration, Washington D.C.
a
x
z
FLORIDA BUILDING CODE — PLUMBING 11.7
STORM DRAINAGE
TABLE 1106.2
SIZE OF VERTICAL CONDUCTORS AND LEADERS
For SI: 1 inch = 25.4 mm, 1 square foot = 0.0929 m2.
a. Sizes indicated are the diameter of circular piping. This table is applicable to piping of other shapes provided the cross-sectional shape fully encloses a circle of
the diameter indicated in this table.
TABLE 1106.3
SIZE OF HORIZONTAL STORM DRAINGE PIPING
SIZE OF
HORIZONTALLY PROJECTED ROOF AREA (square feet)
DIAMETER OF OF
LEADER
---°=���ainfall rate (inches per hour)
'
(inches)'
1
2
3
4
5 J
6
7
8
9
10
11
12
2
2,880
1,440
960
720
i
575
480
410
360
320
290
260
240
3
8,800
4,400
2,930
2,200
1,760
1,470
1,260
1,100
980
880
800
730
4
18,400
9,200
6,130
4,600
3,680
3,070
2,630
2,300
2,045
1,840
1,675
1,530
5
34,600
17,300
11,530
8,650
6,920
5,,765
4,945
4,325
3,845
3,460
3,145
2,880
6
54,000
27,000 1
17,995
13,500
10,800
9,000
7,715
6,750
6,000
5,400
4,910
4,500
8
116,000
58,000
38,660
29,000
23,200
19,315
16,570
14,500
12,890
11,600
10,545
9,600
For SI: 1 inch = 25.4 mm, 1 square foot = 0.0929 m2.
a. Sizes indicated are the diameter of circular piping. This table is applicable to piping of other shapes provided the cross-sectional shape fully encloses a circle of
the diameter indicated in this table.
TABLE 1106.3
SIZE OF HORIZONTAL STORM DRAINGE PIPING
SIZE OF
i
HORIZONTALLY PROJECTED ROOF AREA (square feet) j /
HORIZONTAL
PIPI
Rainfall rate (inches per hour) i
(inches)
1 2 3 4 5 6
'/$ unit vertical in 12 units horizontal (1 -percent slope),Z",
3
1,644
1,096
822 .�'
657
548
4
X7,5
3,760
2,506
1,800
1,504
1,253
5
6,680
4,453
3,340
2,672
2,227
6
,
10,700
7,133
5,350
4,280
3,566
8
46,000
23,000
15,330
11,500
9,200
7,600
10
82,800
1;400
27,600 �'
20,700
16,580
13,800
12
133,200
6 , 00
44,400 ;
33,300
26,650
22,200
15
218,000
109,00
72,800
59,500
47,600
39,650
1/4 unit vertical in 2 u�ti'ts horizontal (2 -percent slope)
3
4,640
2,320
1,546
1,160
928
773
4
10,600
5,300 j
3, 3
2,650
2,120
1,766
5
18,880
9,440 j
6,29
4,720
3,776
3,146
6
30,200
15,1.00
10,066
7,550
6,040
5,033
8
65,200
32/600
21,733
16,300
13,040
10,866
10
116,800
18,400
38,950
29,200
23,350
19,450
12
188,000
/ 94,000
62,600
7,000
37,600
31,350
15
336,000
168,000
112,000
8 , 00
67,250
56,000
/ '/2 unit vertical in 12 units horizontal (4 -percents e)
3
4
i
6 576
1,040
3,288
2,295
1,644X18,58
1,096
7,520
5,010
3,760
2,500
5
/26,720
13,360
8,900
6,680
4,450
6
42,800
21,400
13,700
10,7007,140
92,000
46,000
30,650
23,000
15,320
/18
171,600
85,800
55,200
41,400
33,150
27600
266,400
133,200
88,800
66,600
53,200
44,400
476,000
238,000
158,800
119,000
95,300
250
For SI; 1 inch = 25.4 mm, 1 square foot = 0.0929 m2.
11.8 FLORIDA BUILDING CODE - PLUMBING
1106.6 Size of roof gutters. The size of semicircular gutters
shall be based on the maximum projected roof area in accor-
dance with Table 1106.6.
1106.7 Scupper sizing. Scuppers shall be sized in accordance
with Table 1106.7.
SECTION 1107
SECONDARY (EMERGENCY} ROOF DRAINS
1107.1 Secondary drainage required. Secondary (emer-
gency) roof drains or scuppers shall be provided where the roof
perimeter construction extends above the roof in such a manner -
that water will be entrapped if the primary drains allow buildup
for any reason.
STORM DRAINAGE
1107.2 Separate systems required. Secondary roof drain sys-
tems shall have the end point of discharge separate from the pri-
mary__system. Discharge shall be above grade, in a location
which would normally be observed by the building occupants
or maintenance personnel.
TABLE 1106.6
SIZE OF SEMICIRCULAR ROOF GUTTERS
For SI: 1 inch = 25.4 mm, 1 square foot = 0.0929 mZ.
FLORIDA BUILDING CODE - PLUMBING 11.9
HORIZONTALLY PROJECTED ROOF AREA (square feet)
DIAMETER OF
Rainfall rate (inches per � -
-
GUTTERS-
(Indies)
1 2 3 / 4 5
6
'/16 unit vertical in 12 units horizontal (0.5 -percent slope)
3
680
340
226
170
136
113
4
1,440
720
480
360
288
240
5
2,500
1,250
834
625
500
416
6
3,840
1,920
1,280
960
768
640
7
5,520
2,760
1,840
1,380
1,100
918
8
7,960
3,980
2,655
1,990
1,590
1,325
10
1 14,400
1 7,200
1 4,800
1 3,600
1 2,880
2,400
'/a unit vertical 12 units horizontal (1 -percent slope)
3
960
480
320
240
192
160
4
2,040
1,020
681
510
408
340
5
3,520
1,760
1,172
880
704
587
6
5,440
2,720
1,815
1,360
1,085
905
7
7,800
3,900
2,600
1,950
1,560
1,300
8
11,200
5,600
3,740
2,800
2,240
1,870
10
1 20,400
1 10,200
1 6,800
1 5,100
1 4,080
3,400
'/4 unit vertical in 12 units horizontal (2 -percent slope)
3
1,360
680
454
340
272
226
4
2,880
1,440
960
720
576
480
5
5,000
2,500
1,668
1,250
1,000
834
6
7,680
3,840
2,560
1,920
1,536
1,280
7
11,040
5,520
3,860
2,760
2,205
1,840
8
15,920
7,960
5,310
3,980
3,180
2,655
10
1 28,800
1 14,400
1 9,600
1 7,200
1 5,750
1 4,800
1/2 unit vertical in 12 units horizontal (4 -percent)
3
1,920
960
640
480
384
320
4
4,080
2,040
1,360
1,020
816
680
5
7,080
3,540
2,360
1,770
1,415
1,180
6
11,080
5,540
3,695
2,770
2,220
1,850
7
15,600
7,800
5,200
3,900
3,120
2,600
8
22,400
11,200
7,460
5,600
4,480
3,730
10
1 40,000
1 20,000
1 13,330
10,000
1 8,000
6,660
For SI: 1 inch = 25.4 mm, 1 square foot = 0.0929 mZ.
FLORIDA BUILDING CODE - PLUMBING 11.9
STORM DRAINAGE
TABLE 1106.ZF SIZIN6\SCUPPERS FO
/PER OUR RATE OF
For SI: 1 inc�tthis
25.4 mm.
Note: To adju table for other than a 5 -inch de gn rain fall rate multiply
the squarWfootage on the table by 5 then divide by local design rain fall
rate.
Example: For 4 inches of design rainfall rate, a 4 -inch long scupper with a I -
inch head would accommodate 287 square feet. (230 x 5) — 4 = 287.
1107.3 Sizing of secondary drains. Secondary (emergency)
roof drain systems shall be sized in accordance with Section
1106 based on the rainfall rate for which the primary system is
sized in Tables 1106.2, 1106.3 and 1106.6. Scuppers shall be
sized to prevent the depth of ponding water from exceeding
that for which the roof was designed as determined by Section
1101.7. Scuppers shall not have an opening dimension of less
than 4 inches (102 mm). The flow through the primary system
shall not be considered when sizing the secondary roof drain
system.
SECTION 1108
COMBINED SANITARY AND STORM SYSTEM
1108.1 Size of combined drains and sewers. The size of a
combination sanitary and storm drain or sewer shall be com-
puted in accordance with the method in Section 1106.3. The
fixture units shall be converted into an equivalent projected
roof or paved area. Where the total fixture load on the com-
bined drain is less than or equal to 256 fixture units, the equiva-
lent drainage area in horizontal projection shall be taken as
4,000 square feet (372 m2). Where the total fixture load exceeds
256 fixture units, each additional fixture unit shall be consid-
ered the equivalent of 15.6 square feet (1.5 m2) of drainage
area. These values are based on a rainfall rate of 1 inch (25 mm)
per hour.
SECTION 1109
VALUES FOR CONTINUOUS FLOW
1109.1 Equivalent roof area. Where there is a continuous or
semicontiriuous discharge into the building storm drain or
building storm sewer, such as from a pump, ejector, air condi-
tioning plant or similar device, each gallon per minute (L/m) of
such discharge shall be computed as being equivalent to 96
square feet (9 m2) of roof area, based on a rainfall rate of 1 inch
(25.4 mm) per hour.
SECTION 1110
CONTROLLED FLOW ROOF DRAIN SYSTEMS
1110.1 General. The roof of a structure shall be designed for
the storage of water where the storm drainage system is engi-
neered for controlled flow. The controlled flow roof drain sys-
tem shall be an engineered system in accordance with this
section and the design, submittal, approval, inspection and test-
ing requirements of Section 105.4. The controlled flow system
shall be designed based on the required rainfall rate in accor-
dance with Section 1106.1.
11M.2 Control devices. The control devices shall be installed
so that the rate of discharge of water per minute shall not exceed
the values for continuous flow as indicated in Section 1109.1.
1110.3 Installation. Runoff control shall be by control devices.
Control devices shall be protected by strainers.
1110.4 Minimum number of roof drains. Not less than two
roof drains shall be installed in roof areas 10,000 square feet
(929 mz) or less and not less than four roof drains shall be in-
stalled in roofs over 10,000 square feet (929 m'-) in area.
SECTION 1111
SUBSOIL DRAINS
1111.1 Subsoil drains. Subsoil drains shall be open -jointed,
horizontally split or perforated pipe conforming to one of the
standards listed in Table 1102.5. Such drains shall not be less
than 4 inches (102 mm) in diameter. Where the building is sub-
ject to backwater, the subsoil drain shall be protected by an ac-
cessibly located backwater valve. Subsoil drains shall
discharge to a trapped area drain, sump, dry well or approved
location above ground. The subsoil sump shall not be required
to have either a gas-tight cover or a vent. The sump and pump-
ing system shall comply with Section 1113.1.
SECTION 1112
BUILDING SUBDRAINS
1112.1 Building subdrains. Building subdrains located below
the public sewer level shall discharge into a sump or receiving
tank, the contents of which shall be automatically lifted and
discharged into the drainage system as required for building
sumps. The sump and pumping equipment shall comply with
Section 1113.1.
SECTION 1113
SUMPS AND PUMPING SYSTEMS
1113.1 Pumping system. The sump pump, pit and discharge
piping shall conform to Sections 1113.1.1 through 1113.1.4.
1113.1.1 Pump capacity and head. The sump pump shall
be of a capacity and head appropriate to anticipated use re-
quirements.
1113.1.2 Sump pit. The sump pit shall not be less than 18
inches (457 mm) in diameter and 24 inches (6 10 mm) deep,
unless otherwise approved. The pit shall be accessible and
located such that all drainage flows into the pit by gravity.
The sump pit shall be constructed of tile, steel, plastic,
cast-iron, concrete or other approved material, with a re -
11.10 FLORIDA BUILDING CODE — PLUMBING
HORIZONTALL
PROJECTE OOF AREA (SQUARE FEET)
HEAD
IN INCHES
IN
INCHESE230
6
R!�WEIR
12 16
20
24
I
3461F692
923 1
1153
1384
2
641
961
128
1923 2564
3205
3846
3
1153
1,73 0
2307
3461 4615
5769
6923
4
1794
,/2692
3589 1
5 4 7179
8974
10769
For SI: 1 inc�tthis
25.4 mm.
Note: To adju table for other than a 5 -inch de gn rain fall rate multiply
the squarWfootage on the table by 5 then divide by local design rain fall
rate.
Example: For 4 inches of design rainfall rate, a 4 -inch long scupper with a I -
inch head would accommodate 287 square feet. (230 x 5) — 4 = 287.
1107.3 Sizing of secondary drains. Secondary (emergency)
roof drain systems shall be sized in accordance with Section
1106 based on the rainfall rate for which the primary system is
sized in Tables 1106.2, 1106.3 and 1106.6. Scuppers shall be
sized to prevent the depth of ponding water from exceeding
that for which the roof was designed as determined by Section
1101.7. Scuppers shall not have an opening dimension of less
than 4 inches (102 mm). The flow through the primary system
shall not be considered when sizing the secondary roof drain
system.
SECTION 1108
COMBINED SANITARY AND STORM SYSTEM
1108.1 Size of combined drains and sewers. The size of a
combination sanitary and storm drain or sewer shall be com-
puted in accordance with the method in Section 1106.3. The
fixture units shall be converted into an equivalent projected
roof or paved area. Where the total fixture load on the com-
bined drain is less than or equal to 256 fixture units, the equiva-
lent drainage area in horizontal projection shall be taken as
4,000 square feet (372 m2). Where the total fixture load exceeds
256 fixture units, each additional fixture unit shall be consid-
ered the equivalent of 15.6 square feet (1.5 m2) of drainage
area. These values are based on a rainfall rate of 1 inch (25 mm)
per hour.
SECTION 1109
VALUES FOR CONTINUOUS FLOW
1109.1 Equivalent roof area. Where there is a continuous or
semicontiriuous discharge into the building storm drain or
building storm sewer, such as from a pump, ejector, air condi-
tioning plant or similar device, each gallon per minute (L/m) of
such discharge shall be computed as being equivalent to 96
square feet (9 m2) of roof area, based on a rainfall rate of 1 inch
(25.4 mm) per hour.
SECTION 1110
CONTROLLED FLOW ROOF DRAIN SYSTEMS
1110.1 General. The roof of a structure shall be designed for
the storage of water where the storm drainage system is engi-
neered for controlled flow. The controlled flow roof drain sys-
tem shall be an engineered system in accordance with this
section and the design, submittal, approval, inspection and test-
ing requirements of Section 105.4. The controlled flow system
shall be designed based on the required rainfall rate in accor-
dance with Section 1106.1.
11M.2 Control devices. The control devices shall be installed
so that the rate of discharge of water per minute shall not exceed
the values for continuous flow as indicated in Section 1109.1.
1110.3 Installation. Runoff control shall be by control devices.
Control devices shall be protected by strainers.
1110.4 Minimum number of roof drains. Not less than two
roof drains shall be installed in roof areas 10,000 square feet
(929 mz) or less and not less than four roof drains shall be in-
stalled in roofs over 10,000 square feet (929 m'-) in area.
SECTION 1111
SUBSOIL DRAINS
1111.1 Subsoil drains. Subsoil drains shall be open -jointed,
horizontally split or perforated pipe conforming to one of the
standards listed in Table 1102.5. Such drains shall not be less
than 4 inches (102 mm) in diameter. Where the building is sub-
ject to backwater, the subsoil drain shall be protected by an ac-
cessibly located backwater valve. Subsoil drains shall
discharge to a trapped area drain, sump, dry well or approved
location above ground. The subsoil sump shall not be required
to have either a gas-tight cover or a vent. The sump and pump-
ing system shall comply with Section 1113.1.
SECTION 1112
BUILDING SUBDRAINS
1112.1 Building subdrains. Building subdrains located below
the public sewer level shall discharge into a sump or receiving
tank, the contents of which shall be automatically lifted and
discharged into the drainage system as required for building
sumps. The sump and pumping equipment shall comply with
Section 1113.1.
SECTION 1113
SUMPS AND PUMPING SYSTEMS
1113.1 Pumping system. The sump pump, pit and discharge
piping shall conform to Sections 1113.1.1 through 1113.1.4.
1113.1.1 Pump capacity and head. The sump pump shall
be of a capacity and head appropriate to anticipated use re-
quirements.
1113.1.2 Sump pit. The sump pit shall not be less than 18
inches (457 mm) in diameter and 24 inches (6 10 mm) deep,
unless otherwise approved. The pit shall be accessible and
located such that all drainage flows into the pit by gravity.
The sump pit shall be constructed of tile, steel, plastic,
cast-iron, concrete or other approved material, with a re -
11.10 FLORIDA BUILDING CODE — PLUMBING
BP502I03 CITY OF SANFORD
Inspection Inquiry - Inspection Selection
Property address . . . . . . 1512 W 13TH PL
Parcel Number . . . . . . 35.19.30.505-0000-0030
Application number . . . . . 04 00001371
Application type . . . . . . NEW CHURCHES AND OTHER RELIGIOUS
Type options, press Enter.
1=Select
Opt Str/Seq Pmt/Seq Inspection Type
000 000 BLCA 00 FOUNDATION INSP
000 000 BLCA 00 FOUNDATION INSP
000 000 BLCA 00 SLAB
000 000 BLCA 00 SLAB
000 000 BLCA 00 LINTEL
000 000 BLCA 00 LINTEL
000 000 BLCA 00 LINTEL
000 000 PLCM 00 PLUMBING ROUGH -IN
000 000 PLCM 00 PLUMBING ROUGH -IN
F3=Exit F11=View 2 F12=Cancel
Seq Insp
0001 140
0002 140
0001 140
0002 140
0001 146
0003 140
TM717_�l45
0002 145
12/21/07
08:30:56
Result/Date
DP 3/31/04
AP 4/01/04
DP 10/11/04
AP 10/29/04
DP 9/22/05
9 ��1T( 5
AP 11/08/051
DP 7/01/0
More..
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