PDX 2026-501 (159) C9.08.pdf
PDF 446 KB Posted
- Solicitation number
- 147231
- Issued by
- Multnomah County, Oregon
About this file
This is a technical specification document for the Portland International Airport North Runway Rehabilitation project in Oregon, specifically detailing aircraft-rated catch basin construction requirements for storm drainage systems. The document provides comprehensive engineering drawings and specifications for catch basin installation, including detailed schematics for basin construction, frame and grate assembly, hinge mechanisms, and trap configurations. The catch basins must be designed to meet FAA loading criteria per AC 150/5320-6G standards, accommodating 100,000-pound wheel loads and 250 PSI tire pressure. Construction specifications include precast concrete basin options (one or two pieces), 12-gauge stainless steel hinges, ductile iron frames and grates, 3/8-inch stainless steel concrete expansion anchors spaced at 4-inch centers, and 12-inch diameter HDPE outlet pipes. The document references additional connection details on sheet C9.09 and storm drainage profiles for outlet pipe routing to manholes or storm lines, with final dimensions and specifications to be determined by contractor design subject to engineer approval.
The contractor is required to submit shop drawings and structural calculations stamped by a licensed structural engineer in the state of Oregon for approval prior to construction. Frame and grate dimensions shown represent minimums, with actual components required to match specifications and meet FAA loading standards. The document was prepared by HNTB Corporation under project number 2026-501 with drawing number C9.08, dated October 2026, and was signed by registered professional engineer Hans N. Conradt (Oregon PE #60434, expiring December 31, 2027). The technical specifications ensure that all drainage infrastructure components integrate with the broader North Runway Rehabilitation project scope while maintaining structural integrity under aircraft loading conditions.
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Text version
C9.08
" O
R
0"
3" C
N
TR
2"3 1/2"
3/16"
3"
8"
3"
TYP
3/16
7°
10 GAUGE SHEET
METAL TYPICAL
FOR STANDARD CATCH BASIN
USE 3/8" STAINLESS STEEL
CONCRETE EXPANSION
ANCHOR AT 4" O.C. (TYP.)
6 1/2"
12 GA. STAINLESS
STEEL HINGE 2 1/2" OPEN
WITH 1/2" KNUCKLE
10" LONG WITH 1/4" PIN
(FASTEN WITH 6 1/4"
STAINLESS STEEL
BOLTS). 6"
BEND FITTINGS AS REQUIRED
12" DIA. HDPE OUTLET PIPE
℄ OF HINGE
SEE DETAIL 4
C9.08
TO MANHOLE OR STORM LINE. SEE STORM
DRAINAGE AND UNDERDRAIN PLANS FOR LOCATION
SEE SHEET C9.09 FOR CONNECTION DETAILS
HORIZONTAL AND VERTICAL
AS REQUIRED PER THE
CONTRACTOR'S DESIGN
6" 6"
DIMENSION TO ACCOMMODATE
FRAME AND GRATE
6" 6"
8" MINIMUM CRUSHED AGGREGATE
BASE COURSE(P-209). BASE COURSE
TO BE COMPACTED.
BOTTOM REINFORCING BOTH WAYS
PER THE CONTRACTOR'S DESIGN
8" 1'
-6
VA
R
IE
S
SE
E
ST
O
R M
D R
AI
N
AG
E
PR
O
FI
LE
S
FINISH GRADE
8" 8"
DIMENSION TO ACCOMMODATE
FRAME AND GRATE
6" 6"
6" 6"
OUTLET
PIPE
FRAME & GRATE
SEE DETAIL
NOTES:
1. CATCH BASIN MAY BE PRE-CAST IN ONE OR TWO
PIECES, AS NEEDED, AND DESIGNED TO MEET FAA
LOADING CRITERIA PER AC 150/5320-6G.(100,000 LB
WHEEL LOAD, 250PSI TIRE PRESSURE)
2. THE CONTRACTOR SHALL SUBMIT SHOP
DRAWINGS AND STRUCTURAL CALCULATIONS
STAMPED BY A LICENSED STRUCTURAL ENGINEER
IN THE STATE OF OREGON FOR APPROVAL.
C9.08
8"
VA
R
IE
S
36" MIN
" M
IN
33" MIN
" M
IN
1/ 2"
FRAME
GRATE
NOTES:
1. FRAME AND GRATE SHALL BE DUCTILE IRON.
2. FRAME AND GRATE SHALL BE DESIGNED TO MEET
FAA LOADING CRITERIA PER AC 150/5320-6G
(100,000 LB WHEEL LOAD, 250 PSI TIRE PRESSURE)
3. FRAME AND GRATE DIMENSIONS SHOWN ARE
MINIMUMS. FRAME AND GRATE PROVIDED SHALL
MATCH.
8" MINIMUM CRUSHED AGGREGATE
BASE COURSE(P-209). BASE COURSE
TO BE COMPACTED.
FINISH GRADE
C9.08
BEND FITTINGS AS REQUIRED
TRAP
SCALE:
AIRCRAFT RATED
CATCH BASIN DETAIL
N.T.S.1
10/6/2026
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lig ht da rk gr ay bl ac k
DESIGN NUMBER PROJECT NUMBER
2"
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1:49:41 PM NCHOWDHURY c:\users\nchowdhury\dc\accdocs\hntb corporation\88598 - pdx north runway rehab\project files\shared cad\sheets - civil\storm drainage details.dwg
DISC. SHT. NO.
DRAWING SCALE IS REDUCED 50% WHEN SHEET SIZE IS 11" x 17"
DESIGN BY
DRAWN BY
CHECKED BY
DATE
SHEET NO.
SUBMITTED BY
DRAWING NO.
TYPE:
1/
4" 1/
2" 1"
1/
4" 1/
2" 1"
DATE BY REVISION APPDATE BY REVISION APP ##
IF ELECTRONIC SIGNATURE IS BROKEN OR MISSING - THIS IS NOT A LEGAL DRAWING
PORTLAND INTERNATIONAL AIRPORT
NORTH RUNWAY REHABILITATION
STORM DRAINAGE AND UNDERDRAIN DETAILS 2
GENE TUPPER
C. EISELER
N. CHOWDHURY
H. CONRADT
OCTOBER 2026
159 CD
PDX 2026-501 C9.082024D011 102981
SCALE:
AIRCRAFT RATED
CATCH BASIN SECTION
N.T.S.2 SCALE:
AIRCRAFT RATED CATCH BASIN
FRAME AND GRATE DETAILS
N.T.S.3
SCALE:
HINGE DETAIL
N.T.S.4 SCALE:
TRAP DETAIL
N.T.S.5 SCALE:
TRAP SECTION
N.T.S.6 SCALE:
CATCH BASIN LATERAL DETAIL
N.T.S.7
RE
G ISTERED PROFESS IONALENG I NEER
MARCH 9 , 1999
60434PE
OREGON
12/31/27EXPIRES:
HA NS N . CONRA DT
| 2026-10-06T17:39:10-0700 | |
| Hans N Conradt |
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