MacPlaza 1 Sun-CS 960708~' Consulting Engineers - Planners
~uly 8, 1996
Mr. Ken Griffin, P.E.
c~~
City of Coppell JUL I 0 1
P.O. Box 478
copp .
['( ~ ~-'"~ ENGINEERING
RE: DRAINAGE PIPE FOR
The Owner/Developer of Sunbelt SeffStor~.. would like to use ADS NI~F pipe for the
subject to maintenance by the City of Co~. In addition, we will be con~mctin~ Grate
Inlets to collect the surface water. Our utility contractor would like to us~ standard 4' x
4' Grate Inlets as manuiho'ur~ by Dalworth Quickset Company. The are[precast for H20
wheel loadings and are also not subject to maintenance by the City of Copbell. For a
factor of safety in our drainage system the inlets will be using steel grates
Coppell standard cast iron Brates.
I am enciosin8 a copy ofthe Dalworth Quickset pase showin8 the propos
additional details are currently available.
We appreciate your consideration in this matter and hope that you will autl
of the two alternate sources for our private drainase system.
Sincerely,
Walter J. Nelson, P.E.
308 N.W. Second Street-Suite 5 · Grand Prairie, Texas 75050 · (214) 262-0600 ·
d inlets. No
Fax (214) 263-9123
1190
//X4' QUIKSET GRATEj
HS-20 W~IEEL LOADING
CENTER SECTION
BOTTOM SECTION
APPROXIMATE
SECTION WEIOHTS
2'-~ INSIDE 2800 LBS.
2'-Ii" INSIDE: 5400 LBS.
INSIDE: 41OO LBS.
..~'--~" INSIDe: 4~,00 LBS.
4.'-~ INSIDE 5500 LBS.
APPROXIMATE
BOTTOM WF..JGH TS
2'-~ INSIDE: 4600 LBS.
2'-;~* INSIOE: 5500 LBS.
5:- INSIDE: 6000 LBS.
3" INSIDE 6700 LBS.
INSIDE: 7500 LBS.
EXCAVATION
7'-0"x7'-0"
OPENING SIZE AND
AS REQUIRED
_M.AXIIdUId WID/ OPENING IS 4.8" WITH
36 MAXIMUM TtD'~-I IN ADJACENT WALL.
GI44
r
4'-0~x4'o0' GUIKSET® GRATE INEET
DALWORTH CONCRETE