HomeMy WebLinkAbout(120) Concrete Thrust Block-e--SEE NOTE 2
CONCRETE SHALL BE
IN CONTACT WITH THIS
QUADRANT OF PIPE
PLAN
BEDDING MATERIAL
go• BENDS
PLACE PLASTIC SHEETING
AGAINST PIPE AS SHOWN
CONCRETE
APPROXIMATE 1:1 SLOPE WHERE
DEPTH BELOW PIPE EXCEEDS 6".
SECTION A-A
BUTTRESS DIMENSIONS
PIPE 22 1/2' BEND 45' BEND
SIZE B 1 D 1 B2 D2
6" 1'-5" 1'-5" 1'-5" 1'-5"
8" 1'-5" 1'-5" 2'-1" 1'-6"
12" 1'-10" 1'-10" 3'-4" 2'-0"
16" 3'-0" 2'-0" 3'-10" 3'-0"
20• 3'-6" 2'-8" 5'-6" 3'-4"
24" 4'-4" 3'-0" 6'-10" 3'-10"
1
TEES/90' BEND
B3 D3
2·-1· 1'-6"
2'-8" 2'-0"
4'-9" 2'-6"
6'-2" 3'-6"
8'-4" 4'-0"
9'-8" 5'-0"
11=1 =rn--
'TJ=-T'"""
PLAN -22 1 /2·-45· BENDS
PLAN -45· BENDS
NOTES:
1. DIMENSIONS IN TABLE ARE BASED ON A WATER
PRESSURE OF 150 PSI AND AN EARTH
RESISTANCE OF 1 TON PER SQ. FT.
2. DIMENSION C1,C2,C3 SHOULD BE AS LARGE ENOUGH
TO MAKE ANGLE > 45 DEGREES.
3. DIMENSION A1,A2,A3 SHOULD BE AS LARGE AS
POSSIBLE WITHOUT INTERFERING WITH M.J. BOLTS.
4. SHAPE OF BACK OF BUTTRESS MAY VARY AS LONG
AS POUR IS AGAINST FlRM UNDISTURBED EARTH.
5. MEGA LUGS MAY BE USED IN CONJUNCTION
WITH MIXED CONCRETE THRUST BLOCKING.
6. READY MIX CONCRETE ONLY MAY BE USED
(MNDOT SPEC. 2461, GRADE 'B')
CITY OF EDINA
ENGINEERING
& PUBLIC
WORKS
DEPTS.
CONCRETE THRUST BLOCK
REVISED:
04-09
APPROVED: CITY ENGINEER
STANDARD
PLATE
120