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Sizing Group Vent, Stack , Stack vent
Sizing Group fixture Number of fixture connected to common drain discharging to stack & stack vent
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Sizing Group Vent, Stack , Stack vent
Bsn Group Vent Ur Ur Stack Vent WC WC Common Discharge pipe Stack
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Tables needed for sizing
Fixture unit rating Table 6.3 MINIMUM GRADES OF DISCHARGE PIPES Table MAXIMUM FIXTURE UNIT LOADINGS FOR GRADED DISCHARGE PIPES Table 7.7 MINIMUM SIZE OF GROUP VENTS Table 7.2 MAXIMUM LOADINGS ON STACKS IN FIXTURE UNITS Table 7.5 SIZE OF RELEIF VENTS AND STACK VENTS
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Table 6.1 Fixture unit rating
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Sizing Group Vent, Stack , Stack vent
Bsn Group Vent 40mm 1 Fu 50mm 1 Fu Ur Ur 50mm 1 Fu Stack Vent WC 80mm 6 Fu WC 80mm 6 Fu Common Discharge pipe Stack
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Table 6.3 MINIMUM GRADES OF DISCHARGE PIPES
Size of graded section of pipe DN Minimum grade 40 2.50 50 65 80 1.65 100 150 80 1.65
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Table 7.1 MAXIMUM FIXTURE UNIT LOADINGS FOR GRADED DISCHARGE PIPES
80 1.65 16 Grade 1.65 % cannot be use for small discharge pipe Grade to be up broken common discharge pipe 2.50%
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Add up fixture units of each fixture
6 Fu WC 6 Fu WC 1 Fu Ur 1 Fu Ur 1 Fu Bsn 15 Fu + + + + = Outlet size fixture largest WC 80mm Table 6.3 MINIMUM GRADES OF DISCHARGE PIPES Grade to be up broken common discharge pipe 2.50%
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Table 7.1 MAXIMUM FIXTURE UNIT LOADINGS FOR GRADED DISCHARGE PIPES
80 2.50 27
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Sizing Group Vent, Stack , Stack vent
Bsn Group Vent 40 mm Ur Ur 50 mm Stack Vent WC WC 80 mm Common Discharge pipe 80 mm Discharge pipe 2.50% 80mm 27 fu …..15 Fu Stack
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Add up fixture units of each fixture
6 Fu WC 6 Fu WC 1 Fu Ur 1 Fu Ur 1 Fu Bsn 3 Fu + + + + = Outlet size fixture largest Ur 50mm Table 6.3 MINIMUM GRADES OF DISCHARGE PIPES
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Table 6.3 MINIMUM GRADES OF DISCHARGE PIPES
Size of graded section of pipe DN Minimum grade 40 2.50 50 65 80 1.65 100 150 50 2.50
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Table 7.1 MAXIMUM FIXTURE UNIT LOADINGS FOR GRADED DISCHARGE PIPES
50 2.50 8
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Sizing Group Vent, Stack , Stack vent
Bsn Group Vent 40 mm Ur Ur 50 mm Stack Vent WC WC 50 mm 80 mm Common Discharge pipe 80 mm Discharge pipe 2.50% 50mm 8 fu ….. 3 Fu Stack
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Table 7.7 MINIMUM SIZE OF GROUP VENTS
Size of branch Discharge pipe DN Size of Group vent mm 40 32 50 65 80 100 80 50
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Sizing Group Vent, Stack , Stack vent
Bsn 50 mm Group Vent 40 mm Ur 50 mm Ur 50 mm Stack Vent WC WC 50 mm 80 mm Common Discharge pipe 80 mm Stack
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Table 7.2 MAXIMUM LOADINGS ON STACKS IN FIXTURE UNITS
80 40
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Sizing Group Vent, Stack , Stack vent
Bsn 50 mm Group Vent 40 mm Ur 50 mm Ur 50 mm Stack Vent WC WC 50 mm 80 mm Common Discharge pipe 80 mm Stack 80mm 40fu three or fewer floors….. 15 Fu Per floor 13 fu stack to be 100mm Stack 100 mm
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The developed length of a stack vent shall be-
For stack with relief vents, the length of relief vent; or For stacks without relief vents the length of stack vent and stack to the point of connection of lowest branch point of connection of lowest branch
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Sizing Group Vent, Stack , Stack vent
Bsn 50 mm Group Vent 40 mm Ur 50 mm Ur 50 mm Stack Vent WC WC 50 mm 80 mm Common Discharge pipe 80 mm Stack 100 mm
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Common discharge pipe 80mm Stack 100mm Table 7.4 Stack vent
measured from lowest branch point to termination point The developed length of this job = 28 m Size Stack vent from Table 7.5
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Table 7.5 SIZE OF RELEIF VENTS AND STACK VENTS
80 28m Developed Length is 28 m 100 Please note:- If Number is larger than number in column go to the next highest number
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Sizing Group Vent, Stack , Stack vent
100mm stack, stack vent developed length 28m Total 15 Fu. From Table Stack vent = 80mm Bsn 50 mm Group Vent 40 mm Ur 80 mm 50 mm Ur 50 mm Stack Vent WC WC 50 mm 80 mm Common Discharge pipe 80 mm Stack 100 mm
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Questions B Makin June 2005 RMIT
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