Packaged Metering Manhole Specifications.pdf - Plasti-Fab, Inc.
Packaged Metering Manhole Specifications.pdf - Plasti-Fab, Inc.
Packaged Metering Manhole Specifications.pdf - Plasti-Fab, Inc.
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PART 3<br />
EXECUTION<br />
3.01 INSTALLATION<br />
A. PMMS TOO LARGE TO SHIP FLATBED WILL BE SHIPPED IN FLANGED<br />
AND MATCH-DRILLED SECTIONS ALONG WITH STAINLESS STEEL<br />
FASTENERS FOR ONSITE ASSEMBLY.<br />
B. Verify that dimensions are correct and project conditions are suitable for<br />
installation. Do not proceed with installation until unsatisfactory<br />
conditions have been corrected.<br />
C. Thoroughly clean and remove all shipping materials prior to setting.<br />
D. Install products in accordance with engineer’s specifications, local codes,<br />
general comments below and the Manufacturer’s recommendations.<br />
E. Care shall be taken in the handling, storage and placement of the PMM in<br />
preparation for installation. The contractor shall become familiar with the<br />
recommended handling and installation procedures used with fiberglass<br />
<strong>Metering</strong> <strong>Manhole</strong>s to insure that the manhole is not damaged, and that<br />
the flume is installed in a manner that is consistent with obtaining good<br />
Open Channel flow results.<br />
F. Slinging will be accomplished using nylon or other fabric material. Under no<br />
circumstances shall cable or chain slings be used in direct contact with<br />
fiberglass surfaces<br />
G. The PMM shall be installed level end-to-end and side-to-side, and must<br />
remain level throughout installation. The flume is factory installed in the<br />
<strong>Metering</strong> <strong>Manhole</strong> so that it is absolutely level from front to back and<br />
from side to side, and must remain level after installation.<br />
H. The site shall be excavated wide enough to accommodate the manhole and<br />
to provide a safe working environment for workers.<br />
I. The contractor shall provide a level concrete slab with a smooth troweled<br />
surface. Pad elevation shall be as shown on the drawings, and<br />
positioned so that the invert of manhole piping matches that of the<br />
pipeline. Prior to manhole placement the slab shall be cleaned of all<br />
sharp objects and debris.<br />
J. The foam pad supplied with the manhole shall be placed in the proper<br />
position.<br />
K. If the pipe is already in place the neoprene boots and s/s bands shall be<br />
slipped onto the pipe ends before lowering manhole onto concrete slab.<br />
The neoprene boots can be slipped over pipe ends and the stainless<br />
steel clamps tightened securely. Under no circumstances shall<br />
petroleum lubricants of any type be used to install neoprene boots.<br />
L. <strong>Packaged</strong> <strong>Metering</strong> <strong>Manhole</strong> shall be lowered onto pad in accordance with<br />
the manufacturer's written recommendations.<br />
M. Flume level shall be checked and PMM adjusted if necessary.<br />
N. After the level is confirmed all anchor bolts shall be securely tightened.<br />
O. On larger flumes all open spaces under the flume shall be filled with grout to<br />
provide adequate structural support.<br />
P. Backfill<br />
1. Care shall be taken to avoid uneven backfill loads on the FRP<br />
manhole and flume.<br />
2. Groundwater or surface water runoff shall not be allowed to<br />
accumulate in the open excavation around a manhole that has not<br />
been completely backfilled.<br />
3. Backfill materials shall be placed evenly around the packaged<br />
manhole in approximately 12” (305mm) lifts.<br />
6
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