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Concrete Grades For Manhole Construction: 1. Waste Water Network

This document specifies concrete grades for various components of manhole construction for waste water and storm water networks. For a 1200 diameter waste water manhole, it specifies C25/20 SRC concrete for the blinding, C25/10 SRC concrete for the screed, C40/20 SRC concrete for the base slab, manhole walls and cover slab, and C50/20 SRC concrete for the benching. It also provides specifications for 1500 and 1800 diameter manholes. For storm water manholes, it specifies concrete grades for 1200 and 1500 diameter manholes depending on depth, with C40/20 SRC commonly used for the base slab, manhole walls and cover slab.

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592 views1 page

Concrete Grades For Manhole Construction: 1. Waste Water Network

This document specifies concrete grades for various components of manhole construction for waste water and storm water networks. For a 1200 diameter waste water manhole, it specifies C25/20 SRC concrete for the blinding, C25/10 SRC concrete for the screed, C40/20 SRC concrete for the base slab, manhole walls and cover slab, and C50/20 SRC concrete for the benching. It also provides specifications for 1500 and 1800 diameter manholes. For storm water manholes, it specifies concrete grades for 1200 and 1500 diameter manholes depending on depth, with C40/20 SRC commonly used for the base slab, manhole walls and cover slab.

Uploaded by

Jabin
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as XLSX, PDF, TXT or read online on Scribd
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Concrete Grades for Manhole Construction

1. Waste Water Network


Item Blinding Screed Base Slab MH Wall Cover Slab Benching Boxout Surround for Pipe Reference Documents / Shop Drawings Remarks
Seating Rings Surround

75 mm 50 mm 400 mm 250 mm 250 mm


1200 Dia Manhole C25/20 SRC C25/10 SRC C40/20 SRC C40/20 SRC C50/20 SRC C40/20 SRC C40/20 SRC C25/20 SRC C20/20 SRC Q16010-0200S-PSL-SD-ENV-SW-502-03
-SCREED

50 mm
75 mm 500 mm 250 mm 250 mm
1500 Dia Manhole C25/20 SRC C25/10 SRC C40/20 SRC C40/20 SRC C50/20 SRC C40/20 SRC C40/20 SRC C25/20 SRC C20/20 SRC Q16010-0200S-PSL-SD-ENV-SW-503-03
-SCREED

75 mm 50 mm 600 mm 300 mm 250 mm


1800 Dia Manhole C25/10 SRC C40/20 SRC C40/20 SRC C25/20 SRC C20/20 SRC Q16010-0200S-PSL-SD-ENV-SW-504-03
C25/20 SRC C40/20 SRC C40/20 SRC C50/20 SRC
-SCREED

2. Storm Water Network


Surround for Pipe
Item Blinding Screed Base Slab MH Wall Cover Slab Benching Boxout Reference Remarks
Seating Rings Surround
Type A 50 mm
75 mm 400 mm 200 mm 225 mm
Depth - upto 2.5m C25/20 SRC C25/10 SRC C40/20 SRC C40/20 SRC C50/20 SRC C20/20 SRC C40/20 SRC C20/20 SRC C20/20 SRC Q16010-0200S-PSL-SD-ENV-SD-502-01
1200 Dia Manhole -SCREED

Type A 50 mm
75 mm 500 mm 250 mm 250 mm
Depth - 2.5m to 4m C25/10 SRC C20/20 SRC C40/20 SRC C20/20 SRC C20/20 SRC Q16010-0200S-PSL-SD-ENV-SD-503-01
1500 Dia Manhole C25/20 SRC -SCREED C40/20 SRC C40/20 SRC C50/20 SRC

Type B 50 mm
75 mm 500 mm 250 mm 250 mm
Depth - above 4m C25/10 SRC C20/20 SRC C40/20 SRC C20/20 SRC C20/20 SRC Q16010-0200S-PSL-SD-ENV-SW-504-03
1500 Dia Manhole C25/20 SRC -SCREED C40/20 SRC C40/20 SRC C50/20 SRC

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