AG-0489-S-10-0264 Sheet 31 2000 gallon septic tank detail.pdf

TOP VIEW END VIEW

4"

3"

57"

SIDE VIEW 2000 GALLON TANK

* 18" Minimum Lap Typical at all corners top and bottom

18" Lap*

L.L.

18" Typ.

(12" Min.)

64 "

18" Lap*

#4's @ 12" o.c.

#3's @ 18" o.c.

D ra w n

B y:

C D

V

A p p ro ve d

B y:

T R

B P

.E

D a te : 4

R e vi si o n

S ca le : 1

P ro je ct

D ra w in g

: 1 o f

D e si g n e d B y:

T

R B

P .E

W ill a m e tt e G ra ys to n e In c.

Eu g e n e

, O R

G a llo n

S e p ti c T a n k

Willamette Graystone Inc.

P.O. Box 7816 Eugene, OR 97401

Phone: 541-726-7666

Orenco Systems Inc.

814 Airway Avenue Sutherlin, OR 97479-9012

Phone: 541-459-4449

Slope to drain away from lid

3" Top of walls typical

#3's @ 13" o.c.

18" Lap*

18" Lap*

54"

3 "1

3 "1

5"±

Outlet

Access Riser

Invert Inlet

1" Clear 1" Clear

1" Clear

1 " Clear1

1" Clear

Use a holding clip to anchor wall reinforcement to the exterior frame while bending

#4 @ 12" o.c.

1 "± to center of vertical steel at mid height

#4 hoop 1" clear

70"

75" Top

(2" Minimum clear)

4"

Position access port so that sanitary tee fittings are fully exposed. Edge of access 5" from outside edge of wall

(6" Min.)

Install sanitary tee(s) snugly against tank wall

3 "1

1" Clear

Riser / Tank adapter:

Cast into concrete top for adapting to riser.

(Bond the riser and adapter together w/ PVC cement or 2-part epoxy. Spread around PVC or fiberglass riser adapter. If riser cast into tank embed 1 "±)1

Riser and Lid:

24" Dia. ribbed PVC riser w/ latching lid and polyurethane gasket or approved

30" Dia. required per 340-71-200 when depth of bury greater than 36"

All risers shall be attached in a permanent and watertight manner

Lids shall be kept securely fastened at all times

34" Typ.

65% to 75% of L.L.

2 " Taper (typ)1

#3's @ 15" o.c.

#4's @ 9" o.c.

L.L.

Tank Volumes: Total Volume: 2380 gal± Operating Volume: 2017 gal± Average unit volume full depth : 41.7 gal./in.± Unit volume at typical operating depth : 42.9 gal./in.±

General Notes:

Loads: Top = 400 psf minimum Lateral Load = 62.4 pcf Concentrated Wheel Load = 2500 lb.

The septic tank shall be capable of withstanding long-term hydrostatic loading, in addition to the soil loading, due to a water table maintained at ground surface. Soil Bearing = 1500 psf (re-evaluate support base if soil bearing is less or unequal)

Concrete: The walls and bottom slab shall be poured monolithically.

Reinforcing steel shall be ASTM A-615 Grade 60, fy = 60,000 psi.

The concrete shall achieve a minimum compressive strength of 4,000 psi in 28 days; fc' = 4,000 psi. Concrete shall be ready mix with cement conforming to ASTM C-150, Type II. There shall be a content of not less than six and one half (6 1/2) sacks per cubic yards and maximum aggregate size of 3/4 inch. Water/Cement ratio shall be kept below 0.4, (W:C 0.35±). Air-entraining agents and fibrous reinforcement will enhance workability, curing and watertightness of the tank; however, their usage is optional.

Tanks shall not be moved from the manufacturing site to the job site until the tank has cured for seven (7) days, or has reached two-thirds of the design strength. Proper curing techniques must be used to ensure watertight tanks.

Test: Tanks shall be tested and certified watertight per Oregon On-Site Rules 340-71 and 73.

Installation, bedding, compaction, etc., shall be in strict compliance with the manufacturers standards and state of Oregon's on-site rules 340-71 and

73. All tanks shall be set level on a minimum 3 inch thick compacted sand or approved granular bedding overlying a firm uniform base. The base shall be stable and uniform in order to ensure equal bearing across the tank bottom. Installations with 30 inches or less of ground cover may require additional buoyancy considerations as described in the manufacturers instructions. A minimum cover of 12 inches is required over the tank in areas subject to occasional light wheel loads.

Installation:

Tank Markings: Place marking on the upper most surface over the outlet.

Liquid capacity: 2000 gal.

Max burial depth: 4ft.

Max traffic (wheel): 2500 lbs.

Date manufactured:

Permit no.:

Sanitary Tee(s):

4" min. Dia. Sch. 40 ABS, PVC or approved

150"

49" Typ.

1 " Typ.

(1" Min.)

155" Top

Riser and Lid:

21" Dia. ribbed PVC riser w/ latching lid and polyurethane gasket or approved

All risers shall be attached in a permanent and watertight manner

Lids shall be kept securely fastened at all times

1 " Clear1

Access Port:

18" Diameter minimum, Position access so that outlet fittings are fully exposed; same for inlet when a riser is used.

Tie #4 perimeter hoop to top reinforcing mat.

Inlet

Seep Ring:

Approved watertight seep ring or equivalent method

Coupler:

Neoprene (ASTM C-564) and/or approved watertight equivalent