Drawings.pdf
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- Solicitation number
- W912WJ24Q0016
About this file
This solicitation notice seeks proposals for gatehouse fall protection upgrades at Surry Mountain Lake in Surry, New Hampshire. The scope of work includes demolishing and replacing grating, ladders, and railings at access wells and platforms; installing new davit arm bases and anchors; and performing all related work. The contract value is estimated between $100,000 and $250,000. The solicitation is set aside for small businesses with a NAICS code of 238990 and size standard of $19 million average annual revenue. Proposals are due by the date specified in SAM.gov, where active registration is required for consideration.
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US Army Corps of Engineers ®
SOLICITATION NO.:
CONTRACT NO.:
ISSUE DATE:
New England District
SIGNATURES AFFIXED BELOW INDICATE OFFICIAL RECOMMENDATION AND APPROVAL
OF ALL DRAWINGS IN THIS SET AS INDEXED ON THIS SHEET
APPROVED FOR TECHNICAL ADEQUACY BY:
TECHNICAL LEAD ENGINEER DATE
DATE
DATE
DATE
DATE
APPROVED BY:
APPROVAL RECOMMENDED BY:
CHIEF, ENGINEERING DIVISION
This project was designed by the U.S. Army Corps of Engineers. The initials or signatures and registration designations of individuals appear on these project documents, within the scope of their employment as required by ER 1110-1-8152.
REVIEWED BY:
CHIEF, GEOTECHNICAL/WATER RESOURCES BRANCH
REVIEWED BY:
CHIEF, DESIGN BRANCH
CHIEF, GEO-ENVIRONMENTAL ENGINEERING BRANCH
FALL PROTECTION UPGRADES
SURRY MOUNTAIN LAKE
SURRY, NEW HAPMSHIRE
W912WJ24Q0016
G-001
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INDEX TO DRAWINGS
SHEET NO. DESIGN FILE SHEET TITLE
1 G-001 CON-SM-511_G-001.DWG COVER SHEET AND INDEX
2 S-101 CON-SM-511_S-101.DWG TOWER PLAN VIEW - DEMOLITION
3 S-201 CON-SM-511_S-201.DWG TOWER ELEVATION VIEW - DEMOLITION
4 S-202 CON-SM-511_S-202.DWG TOWER ELEVATION VIEW - NEW WORK
5 S-501 CON-SM-511_S-501.DWG STEEL GRATING, HINGE, AND DAVIT ARM BASE DETAILS
6 S-502 CON-SM-511_S-502.DWG LADDER AND RAILING DETAILS
US Army Corps of Engineers ®
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VICINITY MAP
NOT TO SCALE
NASHUA
CONCORD
MANCHESTER
PROJECT
LOCATION
LAWRENCE
N
NEW HAMPSHIRE
114202
MASSACHUSETTS
KEENE DUBLIN
HANCOCKHARRISVILLE
JAFFREY
FITCHBURG
LOWELL
PETERBOROUGH
BOSTON
12A
MASSACHUSETTS
NEW
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MAINE
CANADA
VT.
CONN. R.I.
HARTFORD
PROV.
CAPE
COD
BOSTON
PORTSMOUTH
CONCORD
PORTLAND
AUGUSTA
BANGOR
ATLANTIC
OCEAN
LOCATION MAP
NOT TO SCALE
PROJECT
LOCATION
FEBRUARY 2024
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SCALE: 3/8" = 1' - 0"
BASEMENT FLOOR PLAN VIEWE3 SCALE: 3/8" = 1' - 0"
GATE WELL PLAN VIEW - EL. 540E12
2' -5
6'
-6
2' -0
6'
-6
6' -5
4'
-0
"STAIRS UP TO
CONTROL ROOM
EXISTING LADDER RUNGS
EMBEDDED IN CONCRETE
TO BE CUT AND REMOVED
EXISTING GRATING TO BE REPLACED
SEE SHEET S-501
EXISTING DAVIT ARM BASE
DO NOT USE
2'-7"
EAST
SERVICE
WELL
WEST
SERVICE
WELL
EAST
EMERGENCY
GATE WELL
WEST
EMERGENCY
GATE WELL
GENERAL NOTES:
1. ALL ACCESS TO WORK AREA SHALL BE THROUGH THE GATEHOUSE DOWN THE
STAIRS INTO THE BASEMENT.
2. FIELD VERIFY ALL EXISTING CONDITIONS. COORDINATE AND FIELD ADJUST
DIMENSIONS AND DETAILS SHOWN ON CONSTRUCTION DRAWINGS WITH
ACTUAL FIELD CONDITIONS. NOTIFY CONTRACTING OFFICER REPRESENTATIVE
(COR) FOR DEVIATION CAUSING CONFLICT WITH DESIGN DRAWINGS.
3. PROTECT ALL EXISTING STRUCTURES FROM DAMAGE DURING CONSTRUCTION.
COORDINATE WITH COR SHOULD CONSTRUCTION REQUIRE TEMPORARY
RELOCATION OR REMOVAL OF EXISTING STRUCTURES.
4. THE RAILS IN THE BASEMENT AROUND THE SERVICE WELLS AND EMERGENCY
GATE WELLS SHALL BE LEFT IN PLACE. THE TOEBOARDS FOR THE RAILS
AROUND THE SERVICE WELLS AND EMERGENCY GATE WELLS ARE CONNECTED
TO THE RAILING USING BOLTS AND MAY BE TEMPORARILY REMOVED FOR
CONSTRUCTION. THE TOEBOARDS AROUND THE SERVICE WELLS AND
EMERGENCY GATE WELLS SHALL BE PUT BACK IN PLACE FOLLOWING THE
COMPLETION OF CONSTRUCTION UNLESS THEY INTERFERE WITH NEWLY
PLACED HARDWARE.
5. ALL ELEVATIONS SHOWN ON DRAWINGS ARE BASED ON MEAN SEA LEVEL
DATUM PER AS-BUILT DRAWINGS FROM 1956.
6. BOLDED ITEMS ON THIS SHEET ARE TO BE DEMOLISHED. NEW WORK WILL BE
SHOWN ON S-202, S-501, AND S-502.
DEFINITIONS:
EL: VERTICAL ELEVATION FROM MEAN SEA LEVEL
USING NGVD27 FROM ORIGINAL PLANS
ACI: AMERICAN CONCRETE INSTITUTE
SS: STAINLESS STEEL
GRATING SPAN DIRECTION
A6 S-201
A11 S-201
5' -0
3'-1"
EXISTING RAILS AND TOEBOARDS
AROUND SERVICE WELLS
SEE GENERAL NOTE 4
PLATFORM
EL. 532.0
PLATFORM
EL. 532.0
PLATFORM
EL. 514.25
PLATFORM
EL. 514.25
J1 S-501
4' -6
9"
4'0 2' 8' 4'0 2' 8'
FLOAT WELL
COVERED BY GRATING
EXISTING GRATING TO BE REPLACED
SEE SHEET S-501
EAST
ACCESS
WELL
WEST
ACCESS
WELL
EXISTING RAILINGS IN
ACCESS WELL
TO BE REMOVED
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SCALE: 1/4" = 1' - 0"
TOWER ELEVATION SECTIONA6
EL. 494.66
EL. 532.0
EL. 550.0
ALL EXISTING LADDER RUNGS TO BE REMOVED
AND CUT FLUSH WITH EXISTING
CONCRETE SURFACE
TYP LOCATIONS
APPROX. 59 LOCATIONS PER WELLREMOVE EXISTING RAILINGS
TYP 6 LOCATIONS PER WELL
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1'-6"
1'-6"7'-6"1'-6" 1'-6"
1' -0
9" (T
YP
DEMOLITION NOTES:
1. EXISTING FALL PROTECTION SYSTEM, INCLUDING EXISTING CABLE, IS BOLTED
TO EXISTING LADDER RUNGS. REMOVE EXISTING FALL PROTECTION SYSTEM,
INCLUDING EXISTING CABLE, AND DISPOSE OF SYSTEM PRIOR TO REMOVING
EXISTING LADDER RUNGS.
2. CUT ALL EXISTING LADDER RUNGS FLUSH WITH THE CONCRETE SURFACE AND
REMOVE EXISTING LADDER RUNGS WITHOUT DAMAGING CONCRETE.
EMBEDDED PORTIONS OF THE RUNGS SHALL BE LEFT IN PLACE AND COATED
WITH CEMENTITIOUS EPOXY RESIN CORROSION INHIBITOR. COAT EMBEDDED
RUNG PORTIONS IN ACCORDANCE WITH MANUFACTURER'S INSTRUCTIONS.
3. DEMOLISHED LADDER RUNGS ARE TO BE RECYCLED TO THE GREATEST EXTENT
POSSIBLE.
4. REMOVE OR CUT ALL EXISTING RAILING MOUNT BOLTS FLUSH WITH THE
CONCRETE SURFACE AND REMOVE EXISTING RAILING MOUNTS WITHOUT
DAMAGING CONCRETE. EMBEDDED PORTIONS OF THE BOLTS SHALL BE LEFT IN
PLACE AND COATED WITH CEMENTITIOUS EPOXY RESIN CORROSION INHIBITOR.
COAT EMBEDDED RUNG PORTIONS IN ACCORDANCE WITH MANUFACTURER'S
INSTRUCTIONS.
1' -0
TY
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SCALE: 1/4" = 1' - 0"
TOWER ELEVATION OPPOSITE SECTIONA11
EL. 494.66
EL. 514.25
EL. 550.0
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EAST WELL SHOWN, WEST WELL SIMILAR BUT OPPOSITE HAND EAST WELL SHOWN, WEST WELL SIMILAR BUT OPPOSITE HAND
0 4' 8'2' 0 4' 8'2'
EXISTING GRATES TO BE DEMOLISHED
REMOVE EXISTING RAILINGS
TYP 6 LOCATIONS PER WELL
REMOVE EXISTING RAILINGS
TYP 6 LOCATIONS PER WELL
REMOVE EXISTING RAILINGS
TYP 6 LOCATIONS PER WELL
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SCALE: 1/4" = 1' - 0"
TOWER ELEVATION SECTIONA6
EL. 484.66
EL. 532.0
EL. 550.0
LADDERS TO BE INSTALLED
SEE SHEET S-502
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1'-9"
1'-6"7'-6"1'-6" 1'-6"
1' -0
9" (T
YP
LADDER NOTES:
1. NEWLY INSTALLED LADDER SHALL BE PREMANUFACTURED ALUMINUM LADDER
INSTALLED IN ACCORDANCE WITH MANUFACTURER'S INSTRUCTIONS. LADDER
SHALL BE SELECTED IN ACCORDANCE WITH THE SPECIFICATIONS.
1' -0
" T
YP
SCALE: 1/4" = 1' - 0"
TOWER ELEVATION OPPOSITE SECTIONA11
EL. 484.66
EL. 514.25
EL. 550.0
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A12 S-501
LOCATION OF
DAVIT ARM BASE
TO BE INSTALLED
C14 S-502
0 4' 8'2' 0 4' 8'2'
C1 S-502
C6 S-502
1' -0
1'-0"
RAILINGS TO BE INSTALLED (TYP)
SEE SHEET S-502
RAILINGS TO BE INSTALLED (TYP)
SEE SHEET S-502
NEW GRATING
TO BE INSTALLED
SEE SHEET S-501
NEW GRATING
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SCALE: 3/4" = 1' - 0"
GRATING PLANJ1
METAL NOTES:
1. ALL ALUMINUM TO BE INSTALLED SHALL BE 6061-T6.
2. GRATING SHALL CONSIST OF ALUMINUM SWAGE-LOCKED GRATING. THE BARS
SHALL BE SMOOTH. THE BARS SHALL HAVE A DEPTH OF 1-3/4 INCH AND A
THICKNESS OF 3/16 INCH. THE BARS SHALL BE SPACED SO THAT THEY HAVE A
MAXIMUM CENTER-TO-CENTER SPACING OF 1-13/16 INCHES. THE SWAGE
CONNECTING BARS SHALL BE SUCH THAT THEY HAVE A MAXIMUM
CENTER-TO-CENTER SPACING OF 4 INCHES.
3. ALL WELDS SHALL BE VISUALLY INSPECTED ALONG 100% OF THEIR LENGTH IN
ACCORDANCE WITH AWS D1.2 TABLE 5.3 FOR CYCLICALLY LOADED
STRUCTURES.
4. ALL WELDING SHOWN ON THIS SHEET SHALL BE PERFORMED USING GAS METAL
ARC WELDING.
5. SS T-HINGES SHALL HAVE ALL CONNECTION SURFACES FLUSH WITH THE
CONNECTED SURFACES.
6. SS T-HINGES SHALL BE SELECTED SUCH THAT BOLT HOLES DO NOT PENETRATE
THE GRATING BARS AND SUCH THAT BOLT HEADS HAVE A MINIMUM CLEAR
DISTANCE OF 1/4 INCH FROM THE EDGE OF THE BOLT HEAD TO THE EDGE OF
ANY GRATING BARS. EACH SS T-HINGE SHALL HAVE A MINIMUM OF TWO BOLT
CONNECTIONS TO THE WELDED ALUMINUM PLATE.
7. BOLTS SHALL BE SIZED APPROPRIATELY FOR HINGE CONNECTION HOLES.
BOLTS SHALL BE MADE OF SS. BOLTS SHALL USE NONCONDUCTIVE WASHERS
BETWEEN THE BOLT HEAD AND THE CONNECTED MATERIAL. NUTS SHALL USE
NONCONDUCTIVE WASHERS BETWEEN THE NUT AND THE CONNECTED
MATERIAL.
8. CONCRETE ANCHOR SCREWS USED FOR THE SS T-HINGES SHALL BE INSTALLED
IN ACCORDANCE WITH THE MANUFACTURER'S INSTRUCTIONS.
9. CONCRETE ANCHORS FOR THE DAVIT ARM BASE SHALL BE PROVIDED BY THE
GOVERNMENT AND SHALL EXTEND 10 INCHES INTO THE CONCRETE. CONCRETE
ANCHORS SHALL CONSIST OF AN EPOXY INJECTION ADHESIVE ANCHORING
SYSTEM. INSTALL ANCHORS IN ACCORDANCE WITH MANUFACTURER
SPECIFICATIONS. THE GOVERNMENT WILL NOT PROVIDE ANY EQUIPMENT FOR
COMPLETING INSTALLATION OF THE ANCHORS.
10. DAVIT ARM BASES WILL BE PROVIDED BY THE GOVERNMENT. CONTRACTOR
SHALL INSTALL DAVIT ARM BASE IN ACCORDANCE WITH MANUFACTURER
SPECIFICATIONS.
11. PERSONNEL INSTALLING THE DAVIT ARM BASE SHALL HAVE ACTIVE ACI
ADHESIVE ANCHOR INSTALLER CERTIFICATIONS.
EXISTING 3X2X1/4 STEEL ANGLE BRACKETS
BRUSH OFF ALL LOOSE PARTICULATES AND LEAVE IN PLACE
DAVIT ARM BASE
TO BE INSTALLED BENEATH GRATING
SEE DETAIL A12/S-501
3'-0"
1' -6
3'
-5
TYP SS T-HINGE
SEE DETAILS E1 AND A1, S-501
5"
ACCESS WELL
6"
6"
1/
2"
3" = 1' - 0"
HINGE DETAILE1
4" MIN4" MIN
GRATING
SS T-HINGE
CHAMFER AT ENDS OF ALL GRATING BARS
1/2" BOTH ENDS
3/16" ALUMINUM PLATE
WELDED TO GRATING
SEE DETAIL A1
3" = 1' - 0"
HINGE CONNECTOR PLATE DETAILA1
AL
U
M
IN
U M
P
LA
TE
LE
N G
TH
S
H
AL
L
BE
SU
C
H A
S
TO
A
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W
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D
IN
G T
O B
AR
S
O N
B O
TH
S
ID
ES
GRATING
33/16
33/16
6" = 1' - 0"
HINGE BOLT CONNECTION DETAILJ12
33/16
3/16" THICK ALUMINUM PLATE
CONCRETE ANCHOR SCREWS
WITH 3 1/2" MIN EMBED (TYP)
DIA PER HINGE MANUFACTURER
CONCRETE OPERATING ROOM FLOOR
EXISTING 3X2X1/4 STEEL
ANGLE BRACKET
1/4"
MINIMUM CLEAR DISTANCE
BETWEEN BOLT HEAD AND
GRATING BAR NONCONDUCTIVE WASHER
NONCONDUCTIVE WASHER
BOLT CONNECTING ALUMINUM PLATE AND HINGE PLATE
HINGE PLATE
2'0 1' 4'
E1 S-501
8" 5"
6 INCH SQUARE
GRATE CUTOUT
SEE NOTE 2
USE SAME DIMENSIONS OPPOSITE HAND FOR
THE OPPOSITE ACCESS WELL, SEE NOTE 1
NOTE 1) EAST WELL SHOWN, WEST WELL SIMILAR BUT OPPOSITE HAND
NOTE 2) THE 6 INCH SQUARE GRATE CUTOUTS SHALL HAVE THE GRATES SIT INSIDE THE LARGER
GRATE PORTIONS. THE 6 INCH SQUARE CUTOUTS SHALL BE DESIGNED SO IT CAN BE
REMOVED FROM ABOVE THE GRATE BY HAND WITHOUT TOOLS. THE 6 INCH SQUARE
CUTOUT SHALL BE ABLE TO CARRY A LIVE LOAD OF 500 POUNDS IN THE DOWNWARD
DIRECTION WHILE THE CUTOUT IS SITTING IN THE LARGER GRATE PORTION. THE
CUTOUT SHALL SIT FLUSH WITH THE LARGER GRATE PORTION. 3"0 6"1-1/2"
6"0 3" 1'
6"0 3" 1'
1/2"
GAP BETWEEN
PLATE CORNERS
AND WELDS (TYP)
4"
A1 S-501
J1
S-
3/16 INCH THICK
SS SHIM
SCALE: 3" = 1' - 0"
EAST ACCESS WELL DAVIT ARM BASEA12
1' -0
1/
8"
1/
4"
10"
1/
2"
3/4"
8 1/2"
DAVIT ARM BASE
PROVIDED BY THE GOVERNMENT
DAVIT ARM BASE BOLT HOLES
25/32 INCH DIAMETER
FOR 3/4" DIAMETER ANCHOR BOLTS
1'-0" 1'-0"
SE
R
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ES
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EXISTING 3X2X1/4 ANGLE BRACKET FOR GRATING
EAST WELL SHOWN, WEST WELL SIMILAR BUT OPPOSITE HAND
6"0 3" 1'
5"
1/4"
GAP ON BOTH ENDS
GRATE TO BE INSTALLED
AN
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B
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S-502
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US Army Corps of Engineers ®
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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1/2" = 1' - 0"
UPPER LADDER SECTION DETAILC1
NOTES:
1. ALL ANCHOR BOLTS USED FOR THE LADDER SHALL BE STAINLESS STEEL
ANCHOR BOLTS WITH A MINIMUM EMBEDMENT DEPTH OF 3.75 INCHES. ALL
ANCHOR BOLTS SHALL HAVE A DIAMETER OF 1/2 INCH AND BE CONCRETE
WEDGE ANCHORS. ALL ANCHORS SHALL BE INSTALLED IN ACCORDANCE WITH
MANUFACTURERS INSTRUCTIONS.
2. 2 INCH DIAMETER SCHEDULE 40 ALUMINUM PIPE RAIL AND COMPATIBLE RAILING
BRACKETS SHALL BE INSTALLED IN ACCORDANCE WITH THE MANUFACTURER'S
INSTRUCTIONS. ALL RAILS SHALL BE BRACKETED INTO THE WALL ON BOTH
SIDES OF THE ACCESS WELL.
3. INSTALL CONCRETE ANCHOR SCREWS INTO THE CONCRETE IN ACCORDANCE
WITH MANUFACTURER'S INSTRUCTIONS.
AC
C
ES
S
W
EL
L
M
AI
N G
AT
E
W
EL
L
1' -0
1' -0
1/2" = 1' - 0"
MIDDLE AND LOWER LADDER SECTION DETAILC6
AC
C
ES
S
W
EL
L
M
AI
N G
AT
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W
EL
L
1'-3"
3' -0
" T
YP
OPERATING HOUSE BASEMENT
1' -0
3'
-0 " T
YP
1'-3"
1' -0
" T
YP
PLATFORM NOT SHOWN FOR CLARITY
EAST WELL SHOWN, WEST WELL SIMILAR BUT OPPOSITE HANDEAST WELL SHOWN, WEST WELL SIMILAR BUT OPPOSITE HAND
0 2' 4'1'0 2' 4'1' SCALE: 1" = 1' - 0"
NEW RAILING POSITIONSC14
AC
C
ES
S
W
EL
L
SE
R
VI
C
E W
EL
L
2' -0
3' -9
ORIENT CONCRETE ANCHOR
SCREWS IN FLANGE SOCKET
AT 45 DEGREES FROM
EXISTING SCREWS
Ø0'-4"RAIL BRACKET
2 INCH DIAMETER
SCHEDULE 40 ALUMINUM
PIPE RAILING
2'-4"
0 1' 2'6"
EAST WELL SHOWN, WEST WELL SIMILAR BUT OPPOSITE HAND
4 CONCRETE SS
ANCHOR SCREWS
FOR EACH FLANGE
SCREWS ARE 1/4 INCH
DIAMETER AND EXTEND
2 1/2 INCHES INTO
CONCRETE
'-0
'-0
SCALE: 1" = 1' - 0"
NEW RAILING POSITIONS - ELEVATIONC16 0 1' 2'6"
EAST WELL SHOWN, WEST WELL SIMILAR BUT OPPOSITE HAND
C
S-
ACCESS WELL
2' -0
3' -9
ALUMINUM LADDERS
4'-6"
3' -0
2'-0"
RAILING FLANGE BASE
0' -9
ALUMINUM RAILINGS
0' -9
AN
SI
D
FE
B
E6EPPJHK
| CON-SM-511_G-001-ANSI 'D'.pdf |
| Sheets and Views |
| ANSI 'D' |
| CON-SM-511_S-101-ANSI 'D'.pdf |
| Sheets and Views |
| ANSI 'D' |
| CON-SM-511_S-201-ANSI 'D'.pdf |
| Sheets and Views |
| ANSI 'D' |
| CON-SM-511_S-202-ANSI 'D'.pdf |
| Sheets and Views |
| ANSI 'D' |
| CON-SM-511_S-501-ANSI 'D'.pdf |
| Sheets and Views |
| ANSI 'D' |
| CON-SM-511_S-502-ANSI 'D'.pdf |
| Sheets and Views |
| ANSI 'D' |
| 2024-02-02T10:58:10-0500 | |
| MUELLER.KATELYN.ELIZABETH.1159407183 |
| 2024-02-02T11:17:18-0500 | |
| TESSIER.MATTHEW.E.1377053253 |
| 2024-02-02T12:28:15-0500 | |
| MARGOLIS.DAVID.I.1228573805 |
| Date10_af_date: 2/2/2024 |
| Date11_af_date: 2/2/24 |
| Date12_af_date: 2/2/24 |
File details come from the government source that posted it. Updated .