HomeMy WebLinkAbout220.00O.D.
3' max.
limits of pipe
compaction
gravel backfill
for pipe bedding
limits of pipe
compaction
grave
forpi...............y
limits of pipe
O.D. compaction
3' max.
0.15 O.D. min.
0.65 O.D. min.
gravel backfill for
foundations when specified
A. Metal and Concrete Pipe
B. Pipe - Arch Installation
Rigid Pipe NOTES:
1. Pipe compaction limits shown on this plan are for pipe
construction in an embankment. For pipe construction
in a trench, the horizontal limits of the pipe compaction
zone shall be the walls of the trench.
2. All steel and aluminum pipe and pipe -arches shall be
installed in accordance with design A.
3. Concrete pipe with elliptical reinforcement shall be
installed in accordance with design A.
4. Concrete pipe, plain or with circular reinforcement, shall
be installed with design A.
5. O.D. is equal to the outside diameter of a pipe or the
outside span of pipe -arch. The dimensions shown as
O.D. with 3' maximum shall be O.D. until O.D. equals
3'; at which point T shall be used.
T-0" for diameters 12" through 42" and spans through
50". 2'-0" for diameters greater than 42" and spans
greater than 50".
15 rise min.
rise min.
A
W (see note 4)
limit of pipe zone
bedding /
material o
for flexible
pipe (see
note 6) AL
to O.D.
foundation
level a
* A = 4" min. 27" I.D. and under
6" min., over 27" I.D.
Bedding for Flexible Pipe
Flexible Pipe NOTES:
1. Provide uniform support under barrels.
2. Hand tamp under haunches.
3. Compact bedding material to 95% max. density; directly
over pipe, hand tamp only.
4. See "Excavation and Preparation of Trench" in sanitary
sewers section of the standard WSDOT/APWA
specifications for trench width "W" and trenching
options. The pipe zone will be the actual trench width.
The minimum concrete width shall be 1 z I.D. = 18".
5. Trench backfill shall conform to "Backfilling Sewer
Trenches" in the sanitary sewers section of the
WSDOT/APWA standard specifications, except that
rocks or lumps larger than 1" per foot of pipe diameter
shall not be used in the backfill material.
6. See "Bedding Material for Flexible Pipe" in aggregates
section of the WSDOT/APWA standard specifications
for the material specifications.
Backfill material placed in 0.5' loose layers and
compacted to 95% maximum density.
Method B or C compaction (WSDOT/APWA)
standard specifications.)
Pipe
Size
Min. dist.
between
barrels
circular pipe
cont., LCPE, CMP
(diameter)
12" to 24"
12"
30" to 96"
diam. / 2
102" to 180"
48"
pipe - arch
metal only
(span)
18" to 36"
12"
43" to 142"
span / 3
148" to 199"
48"
Y � STD. PLAN — 220.00
Y + PUBLIC WORKS PIPE COMPACTION
DEPARTMENT DESIGN AND BACKFILL
F'�pNIf MARCH 2008