Attachment 8_DDG(X) WP4_Amendment 0001_Dwgs.pdf
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- Solicitation number
- N4008525R0001
About this file
These are structural demolition and foundation drawings for the DDG(X) Work Package 4 Shaftline Foundation project at the Philadelphia Navy Yard Annex, prepared for the Naval Facilities Engineering Systems Command. The documents detail the demolition of existing concrete slabs, pipe trenches, machinery pads, and steel column foundations in Building 77H, followed by new foundation construction including a 12-inch thick slab-on-ground, micropiles, and a 7-inch thick T-slot floor. Key technical specifications include reinforcement details, elevation requirements, and special considerations such as a methane gas mitigation plan, underground utility preservation, and precise pile placement guidelines. The project involves careful deconstruction and reconstruction of foundational elements with strict engineering tolerances and safety protocols.
The drawings specify technical requirements for demolition and new construction, including locating micropiles 2'-0" minimum center-to-center from existing piles, providing non-shrink grout beneath the T-slot floor, and implementing specific reinforcement patterns for the new slab-on-ground (#7 rebar at 6" centers east-west, #5 rebar at 12" centers north-south). Additional noteworthy elements include ground-penetrating radar surveys, laser metrology for mapping reinforcing steel, and accommodation for potential narrow shrinkage cracks in the continuously reinforced concrete slab.
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25 26 27 28 29 30 31 32 33
B
34 35
EXISTING BUILDING
77H STEEL COLUMN
(TYPICAL)
EX
IS
TI
NG
MA
CH
IN
ER
Y
PA
D
EXISTING CONCRETE
PILE CAP (BELOW)
(TYPICAL)
EXISTING BRICK WALL
BETWEEN BUILDING
77H AND 77L
'-6
52'-5"±
20'-0"± 20'-0"± 20'-0"± 20'-0"± 20'-0"± 20'-0"±
EXISTING PIPE
TRENCH
11'-4"±
20'-0"± 20'-0"±
37'-2"±
'-2
184'-3 3/4"±
'-5
1/ 2"
4'-2"±
5'-
3'-6"±
20'-0"± 20'-0"±
2'- 3"
EXISTING 14"±Ø AUGER
PRESSURE-GROUTED PILE
(TYPICAL)
EXISTING TRENCH DRAIN
AND GRATING (TYPICAL) EXISTING PIPE
TRENCH
(TYPICAL)
8 (TYP)
5'- 4"
±EXISTING 3"± ISOLATION
JOINT
EXISTING 9" THICK T-SLOT
FLOOR EXISTING
STEEL COLUMN
EXISTING 2"±
ISOLATION JOINT AT
SLAB STEP
EXISTING 2"± ISOLATION
JOINT
EXISTING 3"± WIDE
CONCRETE FOUNDATION
.6
EXISTING STEEL
COLUMN AND
FOUNDATION (TYPICAL)
EXISTING PILE-SUPPORTED SLAB EXISTING SLAB-ON-GROUND
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BRANCH MANAGER
CHIEF ENG/ARCH
FIRE PROTECTION
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SCALE:
CONSTR. CONTR. NO.
SHEET
NAVFAC DRAWING NO.
DES DRW
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AP
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DRAWFORM REVISION: 25 AUGUST 2020
CHK
SATISFACTORY TO
APPROVED
ACTIVITY
DATE
FOR COMMANDER NAVFAC
SEAL
A/E INFO
OF
EPROJECT NO.:
Whitman, Requardt & Associates, LLP 801 South Caroline Street, Baltimore, Maryland 21231
D D
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1733372
N40085-24-R-2653
MRI/PJB
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PROFESSIONAL CERTIFICATION. I HEREBY CERTIFY THAT THESE
DOCUMENTS WERE PREPARED OR APPROVED BY ME, AND
THAT I AM A DULY LICENSED
OF THE STATE OF MARYLAND,
, EXPIRATION DATE
UNDER THE LAWS
LICENSE No.
NEK
GENERAL SHEET NOTES SHEET KEYNOTES
1. REFER TO SHEET 4S001 FOR GENERAL STRUCTURAL NOTES.
2. ELEMENTS SHOWN ON THIS SHEET ARE EXISTING-TO-REMAIN UNLESS
INDICATED TO BE DEMOLISHED.
3. FIELD VERIFY EXISTING ELEMENTS, DIMENSIONS, AND ELEVATIONS TO
THE EXTENT NECESSARY TO PERFORM THE WORK.
4. REFER TO REFERENCE DRAWINGS FOR ADDITIONAL INFORMATION ON
EXISTING PROPULSION MOTOR MACHINERY (PMM) PAD AND PMM
SUPPORT EQUIPMENT PLATFORM PAD.
5. DO NOT UNDERMINE THE EXISTING SLABS NOR FOUNDATIONS TO
REMAIN.
6. UNLESS OTHERWISE NOTED OR INDICATED ON THE REFERENCE
DRAWINGS, EXISTING SLABS-ON-GROUND TO BE DEMOLISHED
TYPICALLY VARY BETWEEN 12" TO 14" THICK. FOR BIDDING PURPOSES
ASSUME SLABS HAVE AN AVERAGE THICKNESS OF 13" AND ARE
REINFORCED WITH ONE LAYER OF DEFORMED REINFORCING STEEL
SPACED AT 6" ON-CENTER EACH WAY.
7. TOPS OF EXISTING BUILDING 77H STEEL COLUMN PILE CAPS ARE
LOCATED AT THE UNDERSIDE OF THE EXISTING-SLAB-ON-GROUND. DO
NOT DAMAGE NOR UNDERMINE EXISTING PILE CAPS.
8. PERFORM THE FOLLOWING SURVEYS AND SUBMIT RESULTS TO THE
CONTRACTING OFFICER: COMPLETELY EXPOSE TOPS OF EXISTING
AUGER PRESSURE-GROUTED PILES AND SURVEY EXISTING PILES TO
DETERMINE LOCATION, GEOMETRY, AND TOP OF PILE ELEVATIONS; IN
AREAS OF SLAB DEMOLITION COMPLETELY EXPOSE TOPS OF EXISTING
BUILDING 77H COLUMN PILE CAPS. SURVEY PILE CAPS TO DETERMINE
EXISTING LOCATION, GEOMETRY, AND TOP OF PILE CAP ELEVATIONS; IN
AREAS OF SLAB DEMOLITION, PROBE ALONG BUILDING 77L BRICK WALL
AT INTERVALS NOT EXCEEDING 2' AND MINIMUM 6' DEPTH. SURVEY ANY
PROBED FOUNDATIONS TO DETERMINE THE EXISTING LOCATION,
GEOMETRY, AND TOP OF FOUNDATIONS.
9. FOR BIDDING PURPOSES, ASSUMED EXISTING PIPE TRENCH WALLS
AND BASE SLABS ARE 9" THICK REINFORCED CONCRETE. ASSUME
GRATING IS 3" DEEP STEEL GRATING WITH 3/8" THICK BEARING BARS.
DEMOLISH PIPE TRENCH WALLS, BASE SLABS, AND GRATING TO
EXTENTS SHOWN.
10. PRIOR TO START OF EXCAVATION AND PRIOR TO SUBMITTING
REINFORCING STEEL OR T-SLOT FLOOR SHOP DRAWINGS, LOCATE
EXISTING UNDERGROUND UTILITIES WITHIN THE PROJECT AREA AND
SUBMIT RESULTS TO THE CONTRACTING OFFICER. DO NOT DAMAGE
EXISTING UNDERGROUND UTILITIES TO REMAIN.
1. DEMOLISH EXISTING PILE-SUPPORTED PMM PAD AND TRENCH DRAIN,
INCLUDING PERIMETER 3"± ISOLATION JOINT. DEMOLISH PILES TO A
MINIMUM 1'-0" BELOW BOTTOM OF NEW SLAB.
2. DEMOLISH EXISTING PMM SUPPORT EQUIPMENT PLATFORM PAD, TRENCH
DRAIN,INCLUDING PERIMETER 1/2"± ISOLATION JOINT, AND GROUND RING.
3. DEMOLISH EXISTING SLAB-ON-GROUND.
4. DEMOLISH EXISTING 2'-0"± DEEP PIPE TRENCH TO EXTENTS SHOWN.
5. DEMOLISH EXISTING 4'-0"± DEEP PIPE TRENCH TO EXTENTS SHOWN.
6. DEMOLISH PIPE TRENCH GRATING ONLY. EXISTING WALLS TO REMAIN.
7. DEMOLISH EXISTING 6'X10'± CONCRETE SPREAD FOOTING AND
PERIMETER ISOLATION JOINT. FOR BIDDING PURPOSES, ASSUME
FOOTING IS 3'-0" THICK.
8. DEMOLISH EXISTING ISOLATION JOINT AROUND PERIMETER OF EXISTING
SLABS TO BE DEMOLISHED.
4SD101
FL
OO
R
PL
AN
DE
MO
LIT
IO
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AS NOTED
TJC AAB RJA
12921616
ENGINEER
41614 02/05/2026
FLOOR PLAN - DEMOLITION
SCALE 1/8" = 1'-0"A1 SHEET LEGEND
INDICATES EXISTING SLAB TO BE DEMOLISHED
INDICATES THE EDGE OF A CHANGE IN SLAB ELEVATION
GRAPHIC SCALE
SCALE:
16'8'4'
1/8" = 1'-0"
PLAN
NORTH
353020101 BLDG 77L
BLDG 77H
E
A
N
WORK AREA
B
D
KEY PLAN
9. PROVIDE TEMPORARY SUPPORT OF EXCAVATION AT EXISTING
SLAB-ON-GROUND AND COLUMN FOUNDATIONS ADJACENT TO DEMOLISHED
SLAB TO AVOID UNDERMINING. DESIGN SUPPORT OF EXCAVATION TO
SUPPORT LATERAL PRESSURE FROM MINIMUM 1000 PSF BEARING
PRESSURE AT FOUNDATIONS, OR AS REQUIRED TO SUPPORT VEHICLE
LOADING DURING CONSTRUCTION. LIMIT MATERIAL STAGING AND STORAGE
AND VEHICULAR LOADING ADJACENT TO SUPPORT OF EXCAVATION AS
NECESSARY PER CONTRACTOR'S ENGINEER'S REQUIREMENTS.
10. APPROXIMATE LOCATION OF EXISTING 24"±X18"± UNDERGROUND
DUCTBANK (ACTIVE).
11. APPROXIMATE LOCATION OF EXISTING 14"ر UNDERGROUND RIVER
WATER PIPE (PRESUMED ABANDONED). VERIFY EXISTING PIPE IS
ABANDONED AND SELECTIVELY DEMOLISH AND CAP AS NECESSARY TO
PERFORM THE WORK IF ABANDONED.
12. APPROXIMATE LOCATION OF EXISTING 12"ر UNDERGROUND RIVER
WATER (SPRINKLER) PIPE (ACTIVE).
MIS
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B
34 35
20'-0"± 20'-0"± 20'-0"± 20'-0"± 20'-0"± 20'-0"±
25 26 27 28 29 30 31
EXISTING BUILDING
77H STEEL COLUMN
(TYPICAL)
32 33
B
EXISTING PIPE
TRENCH
11'-4"±
20'-0"± 20'-0"±
EX
IS
TI
NG
MA
CH
IN
ER
Y
PA
D
EXISTING PIPE TRENCH
4'-2"±
EXISTING PIPE TRENCH
3'-6"±
EXISTING CONCRETE
PILE CAP (BELOW)
(TYPICAL)
2" ISOLATION JOINT
AROUND SLAB
PERIMETER (TYPICAL)
9" 10
TY
P)
CONTAINMENT
TRENCH (TYPICAL)
MICROPILE
(TYPICAL) TOP OF GROUT
HP EL -0.50'
(TYPICAL)2'-
0" (T
YP
6 E
QU
AL
S
PA
CE
S
'-1
0"
DO
N
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XC
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D
6'- 0"
P
ILE
S
PA
CI
NG
30 EQUAL SPACES = 179'-2 3/4"±
DO NOT EXCEED 6'-0" PILE SPACING
2'-0" (TYP)
EXISTING 14"±Ø AUGER
PRESSURE-GROUTED
PILE (TYPICAL)
34 35
20'-0"± 20'-0"±
184'-3 3/4"±
TOC EL -0.67'
TOC EL 0.00'
177'-9 3/4"± 3
'-2
4'- 5 1
/2"
EDGE OF PILE-SUPPORTED
SLAB AND SLAB-ON-GROUND
'-0
EDGE OF
SLAB-ON-GROUND
12" THICK
SLAB-ON-GROUND
9" (TYP)
TOC EL 0.00'2'-3"
9"
'-2
2'- 6"
EXISTING PILE-SUPPORTED SLAB EXISTING SLAB-ON-GROUND
EXISTING 9"± THICK
T-SLOT FLOOR
TOP OF GROUT HP
EL -0.50' (TYPICAL)
TOC EL 0.00'
EXISTING
PIPE TRENCHEXISTING
STEEL COLUMN
(TYPICAL)
AIRPORT RATED
TRENCH DRAIN COVER
(TYPICAL)
CJ
TOC EL 0.00'
TOC EL 0.00'
TOC EL 0.15'
SLOPE
SL
OP
E
SL
OP
E
SL
OP
E
1CJ8
C3 4S501
B4 4S502
9 (TYPICAL)
C1 42502
4S503 C4
C3 4S502
C1 4S501
B4 4S501
C2 4S503
(SIM)
SL
OP
E
SL
OP
E
SL
OP
E
TOP OF GROUT LP
EL -1.00' (TYPICAL)
TOP OF GROUT HP
EL -0.50' (TYPICAL)
2'-9"
EXISTING STEEL
COLUMN AND
FOUNDATION
(TYPICAL)
TOC EL 0.00'
2'X2' SUMP PIT
(TYPICAL)
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CHIEF ENG/ARCH
FIRE PROTECTION
A
B
C
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1 2 3 4 5
1 2 3 4 5
A
B
C
D
SCALE:
CONSTR. CONTR. NO.
SHEET
NAVFAC DRAWING NO.
DES DRW
SY
M
DE
SC
RI
PT
IO
N
DA
TE
AP
PR
DRAWFORM REVISION: 25 AUGUST 2020
CHK
SATISFACTORY TO
APPROVED
ACTIVITY
DATE
FOR COMMANDER NAVFAC
SEAL
A/E INFO
OF
EPROJECT NO.:
Whitman, Requardt & Associates, LLP 801 South Caroline Street, Baltimore, Maryland 21231
D D
G (X
LB
TS
W
P 4:
S H
A
FT
LI
N
E F
O U
N D
A
TI
O N
PH
ILA
DE
LP
HI
A
NA
VY
Y
AR
D
AN
NE
X
PH
ILA
DE
LP
HI
A, P
EN
NS
YL
VA
NI
A
1733372
N40085-24-R-2653
MRI/PJB
HPN
DE
PA
RT
ME
NT
O
F
TH
E
NA
VY
NA
VA
L F
AC
ILI
TI
ES
E
NG
IN
EE
RI
NG
S
YS
TE
MS
C
OM
MA
ND
PROFESSIONAL CERTIFICATION. I HEREBY CERTIFY THAT THESE
DOCUMENTS WERE PREPARED OR APPROVED BY ME, AND
THAT I AM A DULY LICENSED
OF THE STATE OF MARYLAND,
, EXPIRATION DATE
UNDER THE LAWS
LICENSE No.
NEK
GENERAL SHEET NOTES
GRAPHIC SCALE
SHEET KEYNOTES
1. REFER TO SHEET 4S001 FOR GENERAL STRUCTURAL NOTES.
2. FIELD VERIFY EXISTING ELEMENTS, DIMENSIONS, AND ELEVATIONS TO
THE EXTENT NECESSARY TO PERFORM THE WORK.
3. DO NOT UNDERMINE THE EXISTING SLABS NOR FOUNDATIONS TO REMAIN.
4. TOPS OF EXISTING PILE CAPS ARE LOCATED AT THE UNDERSIDE OF THE
EXISTING-SLAB-ON-GROUND. DO NOT DAMAGE NOR UNDERMINE EXISTING
PILE CAPS.
5. AFTER CONCRETE PLACEMENT AND CURING, USE GROUND-PENETRATING
RADAR (GPR) TO LOCATE ALL REINFORCING STEEL AND EMBEDDED ITEMS
WITHIN AREAS OF THE SLABS WHICH DO NOT RECEIVE T-SLOT FLOOR.
SUBMIT RESULTS OF GPR SURVEY TO THE CONTRACTING OFFICER FOR
RECORD PURPOSES. GPR SURVEY MUST INCLUDE BOTH A PDF AND
AUTOCAD FILE PLAN VIEW SHOWING THE LOCATION, DEPTH, SPACING,
AND CLEAR COVER OF REINFORCING STEEL AND EMBEDDED ITEMS.
6. PROVIDE THE GOVERNMENT WITH FOUR WEEKS NOTICE PRIOR TO EACH
CONCRETE SLAB PLACEMENT. THE GOVERNMENT WILL PERFORM LASER
METROLOGY TO MAP OUT THE REINFORCING STEEL AND EMBEDDED
ITEMS WITHIN THE PILE-SUPPORTED SLAB AND SLAB-ON-GROUND. THIS
WILL OCCUR AFTER ALL REINFORCING STEEL IS PLACED, BUT PRIOR TO
PLACEMENT OF ANY CONCRETE. LASER METROLOGY WILL TAKE
APPROXIMATELY 5 WORKING DAYS. COORDINATE SCHEDULE WITH THE
GOVERNMENT.
7. THE SLAB-ON-GROUND IS DESIGNED AS A CONTINUOUSLY REINFORCED
CONCRETE SLAB WITHOUT CONTROL JOINTS. NARROW SHRINKAGE
CRACKS AT A RELATIVELY UNIFORM SPACING OF BETWEEN TWO AND
FOUR FEET ARE ACCEPTABLE AND ANTICIPATED WITHIN THE
SLAB-ON-GROUND FOR A CONTINUOUSLY REINFORCED SYSTEM. IT IS
EXPECTED THAT A PORTION OF THE CRACKS WILL EXCEED THE MAXIMUM
ALLOWABLE CRACK WIDTHS FOR THE SLAB COATING. COORDINATE
MAXIMUM CRACK WIDTHS WITH APPROVED COATINGS. FOR BIDDING
PURPOSES, ASSUME 50 LINEAR FEET OF ROUT AND SEAL CRACK REPAIR.
8. REFER TO ELECTRICAL DRAWINGS FOR GROUNDING GRID AND DETAILS
FOR EMBEDDED ITEMS.
9. METHANE GAS WAS ENCOUNTERED WHILE COLLECTING TEST BORINGS
DURING DESIGN (REFER TO NOTES IN THE BORINGS LOGS). BUILDING 77H
WILL BE OCCUPIED BY THE GOVERNMENT THROUGHOUT CONSTRUCTION
(INCLUDING DURING PILE INSTALLATION). THE CONTRACTOR'S SAFETY
PLAN MUST INCLUDE METHANE AS A POTENTIAL HAZARD THAT MAY BE
ENCOUNTERED DURING CONSTRUCTION. THE METHANE MITIGATION PLAN
(MMP) AT A MINIMUM MUST INCLUDE THE CONTRACTORS APPROACH FOR
MONITORING METHANE GAS DURING PILE INSTALLATION AND ACTIONS
THAT WILL BE TAKEN BY THE CONTRACTOR IF METHANE IS
ENCOUNTERED. CONTRACTOR AND GOVERNMENT PERSONNEL MUST BE
BRIEFED AND NOTIFIED OF THE PLAN. THE PLAN MUST BE REVIEWED AND
APPROVED BY THE CONTRACTING OFFICER AND MUST BE SUBMITTED IN
CONJUNCTION WITH THE CONTRACTOR'S ACCIDENT PREVENTION PLAN
(APP).
10. REFER TO 4SD101 GENERAL SHEET NOTES FOR ADDITIONAL
REQUIREMENTS FOR EXISTING UNDERGROUND UTILITIES.
1. CONCRETE BULKHEAD AT END OF DEMOLISHED PIPE TRENCH.
2. LOCATE MICROPILES 2'-0" MINIMUM CENTER-TO-CENTER FROM EXISTING
AUGER PRESSURE-GROUTED PILES. DO NOT EXCEED 6'-0"
CENTER-TO-CENTER SPACING BETWEEN MICROPILES.
3. PROVIDE 7" THICK T-SLOT FLOOR WITH 1" NON-SHRINK GROUT BENEATH
AND AROUND PERIMETER. PROVIDE TOP OF T-SLOT FLOOR AT ELEVATION
0.00'. REFER TO SHEET 4S401 FOR ADDITIONAL T-SLOT FLOOR DETAILS.
4. APPROXIMATE LOCATION OF PRE-PRODUCTION PILE LOAD TEST.
5. AT INTERFACE WITH EXISTING CONCRETE, PROVIDE TOP OF SLAB MATCHING
TOP OF EXISTING CONCRETE ELEVATION.
6. PROVIDE 12" THICK SLAB-ON-GROUND REINFORCED WITH #7@6 TOP AND
BOTTOM IN PLAN EAST-WEST DIRECTION AND #5@12 TOP AND BOTTOM IN
PLAN NORTH-SOUTH DIRECTION. PROVIDE CONSTRUCTION JOINTS LOCATE
APPROXIMATELY AT THIRD POINTS ALONG THE SLAB LENGTH.
7. PROVIDE 'TYPICAL SLAB-ON-GROUND CONSTRUCTION JOINT' WALL DETAIL
AT EACH END OF SLAB.
8. FILL EXISTING PIPE TRENCH WITH CAPILLARY WATER BARRIER, AND
PROVIDE 12" THICK SLAB-ON-GROUND MATCHING ADJACENT TOP OF SLAB
ELEVATION.
9. AT EXISTING PILE CAPS, REDUCE CAPILLARY WATER BARRIER THICKNESS
BENEATH SLAB-ON-GROUND AS NECESSARY TO MAINTAIN 12" SLAB
THICKNESS.
SCALE:
16'8'4'
1/8" = 1'-0" 4S101
FO
UN
DA
TI
ON
A
ND
F
LO
OR
P
LA
N
AS NOTED
TJC AAB RJA
12921617
ENGINEER
41614 02/05/2026
PLAN
NORTH
353020101 BLDG 77L
BLDG 77H
E
A
N
WORK AREA
B
D
KEY PLAN
FOUNDATION AND FLOOR PLAN
SCALE 1/8" = 1'-0"A1
SHEET LEGEND
INDICATES THE EDGE OF A CHANGE IN SLAB ELEVATION
PRODUCTION PILE PROOF LOAD TEST LOCATION
INDICATES A SLAB-ON-GROUND CONSTRUCTION JOINT
INDICATES ASSUMED DIRECTION OF SLOPE OF NEW CONCRETE
CJ
SLOPE
C2 4S503
10. APPROXIMATE LOCATION OF EXISTING 24"±X18"± UNDERGROUND
DUCTBANK (ACTIVE).
11. APPROXIMATE LOCATION OF EXISTING 12"ر UNDERGROUND RIVER
WATER (SPRINKLER) PIPE (ACTIVE).
MIS
CE
LLA
NE
OU
S C
HA
NG
ES
/25 /25
WR
A
| 4SD101 - FLOOR PLAN - DEMOLITION |
| 4S101 - FOUNDATION AND FLOOR PLAN |
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