Attachment 2 - Drawing_BBVC Roof Replacement.pdf
PDF 5 MB Posted
- Attached to
- Begich, Boggs Visitor Center Roof Replacement
- Solicitation number
- 1240BH26Q0039
- Issued by
-
Department of Agriculture Forest Service
About this file
Summary
This document is a set of design and construction drawings for a roof replacement project at the Begich, Boggs Visitor Center, located at Portage Lake Loop in Girdwood, Alaska 99587. The project is under the jurisdiction of the United States Department of Agriculture Forest Service, Alaska Region, Chugach National Forest, Glacier Ranger District.
The drawings detail the complete demolition and replacement of the existing roof system with a new 145 mil fleece-backed EPDM membrane assembly. Key project components include removal of all existing roofing materials (PVC, EPDM, and metal sections), replacement of roof drains with new cast iron/aluminum models meeting 30-year warranty requirements, installation of R-50 EPS/polyiso insulation with polyurethane adhesive between layers, and new aluminum coping with anchor clips. The project incorporates detailed specifications for membrane splices, terminations, pipe flashing, scupper flashing, and parapet details. A drain heating system is required to prevent ice formation at roof drains and overflows, consisting of self-regulating heat trace cable (6 watts per foot at 40 degrees F) connected to an adjustable controller with roof-mounted sensors. The system must connect to Panel B electrical infrastructure with multiple 120V, 20-amp circuits. The design includes provisions for reinstallation of existing equipment including a Starlink satellite, anemometer, FAA equipment, roof ladders, and heat trace cabling. The contractor must submit traffic control plans, coordinate with building operators on system adjustments, and complete field verification of all conditions prior to bidding. Design date is December 2025.
View the file
Other files
| File | Type | Posted |
|---|---|---|
| Attachment 3 - Specifications_BBVC Roof Replacement.pdf | ||
| Attachment 1 - Schecule of Items.xlsx | XLSX spreadsheet | |
| Attachment 4 - Wage Determination.pdf | ||
| 1240BH26Q0039 - Begich Boggs VC Roof.pdf |
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Text version
FOREST LOCATION MAP
PROJECT LOCATION MAP
TRAVEL DIRECTIONS:
SHEET OF
United States Department of Agriculture
Forest Service
BEGICH, BOGGS VISITOR CENTER
TRAVEL SOUTH FROM ANCHORAGE ON AK-1 (SEWARD HWY). TURN LEFT
ONTO PORTAGE GLACIER ROAD FOR 4.9 MILES. TURN RIGHT ONTO
PORTAGE LAKE LOOP, FOLLOWING SIGNS FOR THE BEGICH, BOGGS
VISITOR CENTER/PORTAGE GLACIER. VISITOR CENTER WILL BE ON YOUR
RIGHT. 60°47'4.74"N 148°50'28.87"W
ROOF REPLACEMENT
RECOMMENDED BY:
APPROVED:
CNF FOREST ENGINEER
GRD DISTRICT RANGER
DATE
DATE
CNF FOREST SUPERVISOR
DATE
DESIGN ENGINEER
/17
/25
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W G;
ALASKA
PORTAGE VALLEY
(R10) ALASKA REGION
CHUGACH NATIONAL FOREST
GLACIER RANGER DISCTRICT
INDEX OF SHEETS
SHEET SHEET TITLE DATE
G-01 COVER SHEET DEC2025
C-01 EXISTING SITE PLAN DEC2025
AD-01 ROOF DEMOLITION PLAN DEC2025
AD-02 EXISTING ROOF PHOTOGRAPHS DEC2025
AD-03 EXISTING ROOF PHOTOGRAPHS DEC2025
A-01 NEW ROOF PLAN DEC2025
A-02 ELEVATIONS DEC2025
A-03 NEW ROOF DETAILS DEC2025
A-04 NEW ROOF DETAILS CONTINUED DEC2025
A-05 NEW ROOF DETAILS CONTINUED DEC2025
A-06 NEW ROOF DETAILS CONTINUED DEC2025
E-01 DRAIN HEATER PLAN DEC2025
Whittier
Girdwood
Project Location
Begich, Boggs Visitor Center
Portage Lake Loop
Girdwood, AK 99587
DATE
DRAWN
DESIGNER
STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/17
/25
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R10
ALASKA REGION
BEGICH, BOGGS
VISITOR CENTER
ROOF
REPLACEMENT
CHUGACH NF
GLACIER RANGER DISTRICT
EXISTING SITE PLAN
12/2025
E.DUGGER
E.DUGGER
G.BERG
C-01 2 12
POTENTIAL CONTRACTOR STAGING AREA. FINAL LOCATION
DEPENDS ON PROJECT TIMING AND ANTICIPATED VISITOR TRAFFIC.
NOTES:
1. FOR MORE DETAILED SITE CONDITIONS, INCLUDING CONTOURS, SEE THE EXHIBIT
DRAWINGS. ORIGINAL SITE PLANS FROM THE FACILITY CONSTRUCTION AND
CLASSROOM ADDITION HAVE DETAILED CIVIL INFORMATION.
2. POTENTIAL CONTRACTOR STAGING AREA IDENTIFIED ON THIS DRAWING IS
PRELIMINARY AND MAY CHANGE TO OTHER PARKING AREAS AT THE CO'S
DISCRETION. IF WORK IS COMPLETED PRIOR TO THE VISITOR CENTER OPENING
FOR THE SEASON THEN CONTRACTOR AREAS WILL LIKELY BE MORE FLEXIBLE.
3. TRAFFIC CONTROLS AND SIGNAGE WILL BE THE RESPONSIBILITY OF THE
CONTRACTOR. SIGNAGE AND TRAFFIC CONTROL IS NOT LIMITED TO WHAT IS
SHOWN HERE - CONTRACTORS MUST BID FOR FLEXIBILITY IN QUANTITY AND
LOCATION OF CONTROLS/SIGNS. TRAFFIC CONTROL PLAN SHALL BE SUBMITTED
AS PART OF THE DEMOLITION & SAFETY PLAN DESCRIBED IN THE SOW,
PARAGRAPH 5.5.
4. EXACT PLACEMENT OF DUMPSTERS, HEAVY EQUIPMENT, AND MATERIAL
STORAGE WILL BE DETERMINED AT THE PRE-CONSTRUCTION MEETING.
PORTAGE GLACIER RD
EARLY WARNING SIGNAGE
BBVC FACILITY
POTENTIAL CONTRACTOR TRAFFIC
CONTROL. FINAL LOCATION DEPENDS ON
PROJECT TIMING AND ANTICIPATED
VISITOR TRAFFIC.
ONE-WAY ENTRY
NOT TO SCALE
EXISTING SITE PLAN
N
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NIC
60 MIL FULLY
ADHERED PVC
(2) LAYERS OF 3.2"
ISO INSULATION
8 MIL POLY VB
7/16" EXPOSURE
1 OSB
" GYP BD
MECHANICALLY
FASTENED
CONCRETE
PAVERS
60 MIL EPDM
R-50 EPS
INSULATION
10 MIL POLY
V.R.
CONCRETE
DECK
METAL TRACK AT
PERIMETER IN SOME
LOCATIONS
LOOSE
LAID
FILTER
FABRIC
DRAWN
DESIGNER
STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/17
/25
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R10
ALASKA REGION
BEGICH, BOGGS
VISITOR CENTER
ROOF
REPLACEMENT
CHUGACH NF
GLACIER RANGER DISTRICT
ROOF DEMOLITION PLAN
12/2025
E.DUGGER
E.DUGGER
G.BERG
AD-01
3 12
NOTES:
1. FOR MORE DETAILED EXISTING ROOF CONDITIONS AND ASSEMBLIES SEE THE ATTACHED AS-BUILT DRAWINGS.
ROOFING DETAILS FROM 2004 FOR THE EPDM SECTION, AND DETAILS FROM THE PVC ADDITION ARE INCLUDED.
2. PHOTOGRAPHS ARE PROVIDED ON SHEETS AD-02/03 FOR ADDITIONAL REFERENCE.
3. FOR BLDG ELEVATIONS, SEE AS-BUILT DRAWINGS.
4. CONTRACTOR MUST FIELD VERIFY CONDITIONS, QUANTITIES, AND DIMENSIONS PRIOR TO BIDDING AND ORDERING
MATERIALS.
5. CONTRACTOR SHALL REMOVE ALL EXISTING ROOFING MATERIALS, FLASHING, TRIM, AND RELATED ITEMS IN THEIR
ENTIRETY AS DESCRIBED IN THE SOW AND PROJECT SPECIFICATIONS.
6. THE AIR CONDITIONING UNIT WILL BE REMOVED BY THE FOREST SERVICE PRIOR TO CONSTRUCTION.
ROOF DRAIN
SCUPPER
PIPE PENETRATION
STACK PENETRATION
HVAC HOOD
PVC ROOFING (DETAIL D1)
EPDM ROOFING (DETAIL D2)
METAL ROOFING
010 10 20 FT
NOT TO SCALE
EXISTING PVC ASSEMBLY
D1
NOT TO SCALE
EXISTING EPDM ASSEMBLY
D2
1" = 12'
ROOF DEMOLITION PLAN
N
P7
AD-03
P8
AD-03
STARLINK SATELLITE TO BE REMOVED
& REINSTALLED BY CONTRACTOR
P9
AD-03
P6
AD-03
P7
AD-03
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STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/17
/25
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ALASKA REGION
BEGICH, BOGGS
VISITOR CENTER
ROOF
REPLACEMENT
CHUGACH NF
GLACIER RANGER DISTRICT
EXISTING ROOF PHOTOS
12/2025
E.DUGGER
E.DUGGER
G.BERG
AD-02
4 12
ALUMINUM TRACKS AROUND PERIMETER OF
THE EAST SECTION OF THE ROOF, TO BE
REMOVED WITH THE BALLASTS
ROOF DRAIN PITS TO BE REMOVED AND
REPLACED WITH DOME STYLE DRAINS
PVC SECTION OF ROOF - SEE DETAIL
D1 ON SHEET AD-01 FOR ASSEMBLY
NOT TO SCALE
EXISTING ROOF PANORAMIC
P1
NOT TO SCALE
PVC ROOF SECTION
P2
NOT TO SCALE
ROOF DRAIN
P3
NOT TO SCALE
ALUMINUM TRACKS
P4
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STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/17
/25
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R10
ALASKA REGION
BEGICH, BOGGS
VISITOR CENTER
ROOF
REPLACEMENT
CHUGACH NF
GLACIER RANGER DISTRICT
EXISTING ROOF PHOTOS
12/2025
E.DUGGER
E.DUGGER
G.BERG
AD-03
5 12
EXISTING ELECTRICAL
INFRASTRUCTURE CAN BE
RE-USED FOR NEW SNOW MELT
A/C UNIT AND STAND WILL BE
REMOVED BY THE GOV PRIOR TO
CONSTRUCTION STARTING
TWO ROOF LADDERS TO BE
REMOVED AND REINSTALLED BY
THE CONTRACTOR
NOT TO SCALE
HEAT TRACE CABLING & POWER
P5
NOT TO SCALE
AIR CONDITIONING UNIT
P6
NOT TO SCALE
ROOF LADDER
P7
NOT TO SCALE
FAA EQUIPMENT
P9
NOT TO SCALE
ANEMOMETER
P8
ANEMOMETER TO BE REMOVED
AND REINSTALLED AFTER
CONSTRUCTION BY CONTRACTOR
EQUIPMENT TO STAY IN PLACE FOR
CONSTRUCTION. IF REMOVAL IS
NEEDED, THE CONTRACTOR IS TO
COORDINATE WITH FAA.
AT LEAST (8) 120/240V 20A
CIRCUITS AVAILABLE FOR
UTILIZATION FOR NEW HEATERS
IN PANEL 'B'
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DESIGNER
STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/17
/25
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R10
ALASKA REGION
BEGICH, BOGGS
VISITOR CENTER
ROOF
REPLACEMENT
CHUGACH NF
GLACIER RANGER DISTRICT
NEW ROOF PLAN
12/2025
E.DUGGER
E.DUGGER
G.BERG
A-01 6 12
ROOF DRAIN
SCUPPER
PIPE PENETRATION
STACK PENETRATION
VENT PENETRATION
METAL DECK ASSEMBLY (DETAIL B1, SHT A-03)
CONCRETE DECK ASSEMBLY (DETAIL B2, SHT A-03)
010 10 20 FT
NOTES:
1. CONTRACTOR MUST FIELD VERIFY CONDITIONS AND DIMENSIONS PRIOR TO BIDDING AND ORDERING MATERIALS.
2. REPLACE ALL ROOF DRAINS IN THE CONCRETE DECK ASSEMBLY AREA WITH NEW CAST IRON/ALUMINUM ONES AS SHOWN
ON B3, SHT A-03. DRAINS IN METAL DECK PORTION DO NOT NEED TO BE REPLACED.
3. REPLACE ALL BOOTS, FLASHING AND COPING THROUGHOUT WITH PRODUCTS THAT MEET THE MANUFACTURER'S
REQUIREMENTS FOR 30 YEAR ROOF WARRANTY AS WELL AS THE PROJECT SPECIFICATIONS.
4. CONTRACTOR MUST SUBMIT, FOR GOVERNMENT APPROVAL, DETAILS FOR ALL PENETRATIONS, CURBS, PARAPETS, AND
DRAINS IAW ROOFING MANUFACTURER'S REQUIREMENTS FOR 30 YEAR WARRANTY.
1" = 10'
NEW ROOF PLAN
N
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SOUTH ELEVATION
SCALE: 1" = 10'
SCALE: 1" = 10'
NORTH ELEVATION
WEST ELEVATION - ADDITION
SCALE: 1" = 10'
EAST ELEVATION - ADDITION
SCALE: 1" = 10'
5 10
5 10
5 10
5 10
DRAWN
DESIGNER
STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/17
/25
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ALASKA REGION
BEGICH, BOGGS
VISITOR CENTER
ROOF
REPLACEMENT
CHUGACH NF
GLACIER RANGER DISTRICT
ELEVATIONS
12/2025
E.DUGGER
E.DUGGER
G.BERG
A-02 7 12
NOTES:
1. REALIGN EXISTING SLOPED MEMBRANE TERMINATION AROUND THE CLASSROOM SECTION TO REMOVE CURVES AND
REPLACE WITH STRAIGHT LINES TO ENABLE PROPER REGLET/COUNTERFLASHING INSTALLATION.
2. REMOVE/GRIND MASONRY FLUTES TO ESTABLISH SMOOTH SURFACE FOR THE MEMBRANE.
3. EXACT MEMBRANE LINE TO BE DETERMINED IN THE FIELD WITH INPUT AND AGREEMENT FROM THE CONTRACTOR, MANUFACTURER, AND GOVERNMENT.
PROPOSED NEW MEMBRANE LINE
EXISTING MEMBRANE LINE
PROPOSED NEW MEMBRANE LINE
EXISTING MEMBRANE LINE
PROPOSED NEW MEMBRANE LINE
EXISTING MEMBRANE LINE
PROPOSED NEW MEMBRANE LINE
EXISTING MEMBRANE LINE
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METAL DECK
5/8" GYPSUM COVERBOARD
MECHANICALLY FASTENED PER
MANUFACTURER'S REQUIREMENTS
FOR ASCE-7 UPLIFT RATING
R-50 EPS/POLYISO INSULATION
POLYURETHANE ADHESIVE
B/W LAYERS
40 MIL SELF-ADHERING
RUBBERIZED ASPHALT
VAPOR BARRIER, WITH
PRIMER
5/8" COVERBOARD
POLYURETHANE
ADHESIVE
145 MIL FLEECE-BACKED
EPDM MEMBRANE
40 MIL SELF-ADHERING
RUBBERIZED ASPHALT VAPOR
BARRIER, WITH PRIMER
CONCRETE DECK
R-50 EPS/POLYISO INSULATION
POLYURETHANE ADHESIVE
B/W LAYERS
5/8" COVERBOARD
POLYURETHANE
ADHESIVE
145 MIL FLEECE-BACKED
EPDM MEMBRANE
COPING COVER, 12' LENGTHS, .050 ALUMINUM
12" WIDE 16 GA GALV.
ANCHOR CLIPS W/ FORMED
FRONT SUPPORT 2' OC
8" WIDE SPLICE PLATE W/
DUAL NON-CURING STRIPS
@ EA JOINT
INSIDE
FACE
OUTSIDE
FACE
ACTUAL WALL
WIDTH
NEW WOOD NAILER
NOTES:
1. INSIDE AND OUTSIDE FACE VALUES WILL VARY BASED ON LOCATION. OUTSIDE FACE MIN IS 3
", MAX 12". OUTSIDE FACE SHALL BE A MIN OF 8" WHEN OVERLAPPING AN ADJACENT
FINISHED SURFACE. INSIDE FACE MIN IS 2
", MAX 12".
2. COPING MUST BE .050 ALUMINUM (MIN.), FM 1-225 APPROVAL.
3. WOOD NAILER TO BE TREATED 2X, SECURED USING
" X 5" GALVANIZED ANCHOR BOLTS AT 2'
O.C. EXISTING NAILER CAN BE RE-USED IF THE GOVERNMENT, COPING MANUFACTURER,
AND CONTRACTOR AGREE THAT IT IS IN ACCEPTABLE CONDITION.
#10 X 1
" (38 MM)
STAINLESS STEEL FASTENERS
NOTES:
1. REMOVE EXISTING LEAD, FLASHING MATERIAL & ENSURE THE DRAIN RING IS COMPLETELY CLEAN DOWN TO BARE METAL.
2. FLEECE BACKING MUST BE REMOVED FROM THE MEMBRANE SO THAT WATER CUT OFF MASTIC IS IN DIRECT CONTACT.
3. THE HOLE IN THE MEMBRANE SHALL EXCEED THE DIAMETER OF THE DRAIN PIPE, BUT SHALL BE NO LESS THAN 1/2" FROM THE ATTACHMENT POINTS OF THE DRAIN
CLAMPING RING.
4. ALL BOLTS OR CLAMPS MUST BE IN PLACE TO PROVIDE CONSTANT COMPRESSION ON WATER CUT-OFF MASTIC.
5. FIELD SPLICES MUST BE LOCATED AT LEAST 6 INCHES OUTSIDE THE DRAIN SUMP.
6. ROOF DRAIN PIPING TO REMAIN IN PLACE (PRIMARILY 3") BUT NEW ROOF DRAINS MUST BE PROVIDED. SEE SPECIFICATIONS SECTION 077200 FOR REQUIREMENTS.
DIMENSION
"X"
GREATER THAN
DIMENSION "X"
DRAIN PIPE
MIN. 1/2"
FLEECE-BACKED EPDM
SEE NOTE(S)
APPROVED SUBSTRATE
NEW ROOF DRAIN
ASSEMBLY PER
PROJECT
SPECIFICATIONS
WATER CUT-OFF
MASTIC
COMPLETELY REMOVE THE FLEECE
IN CLAMPING RING AREA
M
A
X
I M
U
M
A
L
L
O
W
D
S
O
P
E
R
T
I O
N
D
R
A
S
U
M
P
25%
14°
3:12
MAX.
APPROVED ADHESIVE
DRAWN
DESIGNER
STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/17
/25
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ALASKA REGION
BEGICH, BOGGS
VISITOR CENTER
ROOF
REPLACEMENT
CHUGACH NF
GLACIER RANGER DISTRICT
NEW ROOF DETAILS
12/2025
E.DUGGER
E.DUGGER
G.BERG
A-03 8 12
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B1
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NEW EPDM ASSEMBLY
B2
NOT TO SCALE
NEW ROOF DRAIN
B3
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NEW COPING
B4
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END LAP SPLICEMEMBRANE SPLICE
NOTES:
1. APPLY EPDM PRIMER TO MEMBRANE SURFACES PRIOR TO INSTALLING FLASHING AND/OR FACTORY APPLIED TAPE.
2. APPLY LAP SEALANT ALONG THE EDGE OF THE MEMBRANE SPLICE (UNDER THE 6"x6" T-JOINT COVER) COVERING THE EXPOSED SPLICE
TAPE 1/2" IN EACH DIRECTION FROM THE SPLICE INTERSECTION.
3. ALL EPDM SPLICE INTERSECTIONS MUST BE OVERLAID WITH TWO LAYERS OF EPDM FLASHING. THE BOTTOM LAYER SHALL BE 6"X6"
COVERED WITH A 12"X12" TOP LAYER. BOTH LAYERS SHALL BE CENTERED OVER THE SPLICE INTERSECTION AND SEALED WITH
CONTINUOUS LAP SEALANT, AS SHOWN.
M
A X
FLEECE-BACKED
EPDM
EPDM PRIMER
6" WIDE
FACTORY-APPLIED
TAPE
12" WIDE EPDM FLASHING
CENTERED OVER COVER
STRIP
6" WIDE CURED COVER STRIP
CENTERED OVER BUTTED END
LAPS
LAP SEALANT
6" AND 12" T-JOINT
DETAIL B6
F.A.T.
EPDM PRIMER
T-JOINT PER DETAIL B6
12" WIDE EPDM
FLASHING
LAP SEALANT
FIELD
SPLICE
6" WIDE CURED COVER STRIP CENTERED
OVER BUTTED END LAPS NOTES:
1. APPLY LAP SEALANT ALONG THE EDGES OF THE
MEMBRANE SPLICE COVERING THE EXPOSED SPLICE
TAPE 1/2" IN EACH DIRECTION FROM THE SPLICE
INTERSECTION.
2. APPLY LAP SEALANT AT CUT EDGES OF REINFORCED
MEMBRANE AND TAPE OVER LAPS.
RELEASE FILM
RELEASE FILM
POSITION MEMBRANE TO ALLOW AN APPROXIMATE 7"
OVERLAP. MARK THE BOTTOM SHEET WITH AN INDELIBLE
MARKER 1/2" FROM THE EDGE OF THE TOP SHEET AS SHOWN.
THE PRE-MARKED LINE ON THE MEMBRANE EDGE CAN ALSO BE
USED AS A GUIDE.
FOLD SHEETS BACK AS SHOWN. APPLY EPDM PRIMER TO THE
SPLICE AREA ON BOTH SURFACES AND ALLOW TO FLASH-OFF.
APPLY SPLICE TAPE WITH RELEASE FILM ALIGNED WITH
MARKED LINE.
SPLICE SHEET B TO SHEET A AND APPLY SECOND PIECE OF
SPLICE TAPE BETWEEN SHEET B AND C. TRIM RELEASE FILM
AS SHOWN.
SPLICE SHEET C TO SHEET A AND B, PRESS TOP SHEET ONTO
BOTTOM SHEET USING HAND PRESSURE TOWARDS THE OUTER
EDGE OF THE SPLICE AND ROLL THE SPLICE AREA WITH A 2"
WIDE STEEL ROLLER.
APPLY 6" T-JOINT COVER AND 12" T-JOINT COVER OR EPDM
FLASHING CENTERED OVER THE INTERSECTING POINT OF THE
LEADING EDGES OF THE FIELD SPLICE INTERSECTION AS
SHOWN.
SPLICE TAPE
C
B
MEMBRANE
MEMBRANE
MEMBRANE
A
A
A
B
B
C
C
C
B
A
C
A
RELEASE FILM
B
MINIMUM
6" WIDE
SPLICE
SPLICE TAPE
SECOND LAYER
SPLICE TAPE
LAP SEALANT APPLIED
ALONG MEMBRANE EDGE
SPLICE TAPE
6" T-JOINT COVER
AND EPDM PRIMER
LAP SEALANT
BELOW THE 6"
T-JOINT COVER
12" T-JOINT COVER
AND EPDM PRIMER
LAP SEALANT
DRAWN
DESIGNER
STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/17
/25
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R10
ALASKA REGION
BEGICH, BOGGS
VISITOR CENTER
ROOF
REPLACEMENT
CHUGACH NF
GLACIER RANGER DISTRICT
NEW ROOF DETAILS
CONTINUED
12/2025
E.DUGGER
E.DUGGER
G.BERG
A-04 9 12
NOT TO SCALE
MEMBRANE SPLICES
B5
NOT TO SCALE
T-JOINT DETAIL
B6
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USE 8A OR 8B
TERMINATION
NOTES:
1. MEMBRANE SPLICES SHALL INCORPORATE 6" WIDE SPLICE TAPE
W/ PRIMER.
2. 6" FIELD APPLIED TAPE MUST BE OUTSIDE PLATES.
3. 9" WIDE FLEECE-BACKED MEMBRANE INSTALLED WITH
FLEECE-BACKING SIDE FACING UP.
4. ADHESIVE BEADING IS SHOWN FOR ILLUSTRATIVE PURPOSES
ONLY - ACTUAL SPACING AND QUANTITY TO BE DETERMINED BY
MANUFACTURER TO OBTAIN REQUIRED WARRANTY.
5. ALL SPLICE INTERSECTIONS REFER TO SHEET A-04 DETAILS.
MANUFACTURER APPROVED
BONDING ADHESIVE
FASTENER & SEAM FASTENING
PLATE, MAX. 12" (30cm) O.C.
SEPARATE MEMBRANES
MANUFACTURER APPROVED
BONDING ADHESIVE
USE 8A OR 8B TERMINATION
FASTENER & SEAM FASTENING
PLATE, MAX. 12" (30cm) O.C.
CONTINUOUS MEMBRANES
MIN. 1/4"
MAX. 1/2"
NOTES:
1. APPLY ON HARD SMOOTH SURFACE ONLY; NOT FOR USE ON
EXPOSED WOOD.
2. DO NOT WRAP TERMINATION BAR AROUND CORNERS.
3. FLEECE-BACKING MUST BE REMOVED FROM THE MEMBRANE
SO THAT WATER CUT-OFF MASTIC IS IN DIRECT CONTACT.
4. DETAIL 8C MUST BE USED AT VERTICAL JOINTS IN PANEL
WALLS.
8B
8A
NOTES:
1. FOR COPING, REFER TO INSTALLATION
INSTRUCTIONS FROM THE
MANUFACTURER.
2. MEMBRANE MUST BE EXTENDED TO
CORNERS TO PROVIDE COMPLETE
COVERAGE OF THE TOP WALL SURFACE.
MECHANICAL TERMINATION WITH COUNTER FLASHING
SHEET METAL COPING
APPLICABLE BONDING ADHESIVE
WATER CUT-OFF MASTIC- MUST BE HELD UNDER
CONSTANT COMPRESSION.
8C
1"
MECHANICAL TERMINATION AT VERTICAL JOINTS
NOTES:
1. VERTICAL JOINTS IN THE PRE-CAST PANEL AS WELL AS ALL GAPS
AT THE JUNCTION OF THE TILT-UP PANEL AND ROOF DECK MUST
BE FULLY SEALED TO PREVENT AIR INFILTRATION.
2. APPLY ON HARD SMOOTH SURFACE ONLY.
METAL
COUNTER
FLASHING
SEALANT
0.5"
SEALANT
MANUFACTURER APPROVED POLYETHER
SEALANT
METAL COUNTER FLASHING
TERM BAR NAIL-IN
TERMINATION BAR
SEE SHEET A-02, DETAIL
B4 FOR COPING REQS
EXTEND MEMBRANE
BELOW JOINT
W
A
P
N
J
I
N
T
S
R
O
F
M
M
B
R
A
T
T
R
M
I
N
A
T
I
V
E
L
TERMINATION BAR
FLEECE-BACKED EPDM
SEE NOTE(S)
APPROVED ADHESIVE
WATER CUT-OFF MASTIC
DRAWN
DESIGNER
STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/17
/25
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R10
ALASKA REGION
BEGICH, BOGGS
VISITOR CENTER
ROOF
REPLACEMENT
CHUGACH NF
GLACIER RANGER DISTRICT
NEW ROOF DETAILS
CONTINUED
12/2025
E.DUGGER
E.DUGGER
G.BERG
A-05 10 12
NOT TO SCALE
PARAPET/CURB FLASHING
B7
NOT TO SCALE
MEMBRANE TERMINATIONS
B8
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NOTES:
1. WOOD NAILERS ARE INSTALLED ONLY AT SCUPPERS TO
SECURE METAL SLEEVE AND MUST EXTEND PAST THE WIDTH OF
METAL SLEEVE FLANGE.
2. INSTALL WALL FLASHING PRIOR TO SCUPPER INSTALLATION.
3. METAL SCUPPER BOX MUST HAVE CONTINUOUS FLANGES WITH
ROUNDED CORNERS. SOLDER ALL SCUPPER SEAMS
WATER-TIGHT.
4. WATER CUT-OFF MASTIC UNDER SCUPPER FLANGE MUST BE
UNDER CONSTANT COMPRESSION.
5. SCUPPER FLANGES MUST BE TOTALLY COVERED BY EPDM
FLASHING WITH MINIMUM 2" COVERAGE PAST NAIL HEADS.
6. TO REMOVE FINISHING OILS, SCRUB METAL FLANGE WITH
WEATHERED MEMBRANE CLEANER; ALLOW TO DRY PRIOR TO
APPLYING EPDM PRIMER.
7. APPLY EPDM PRIMER TO METAL FLANGE AND MEMBRANE
SURFACE PRIOR TO INSTALLING EPDM FLASHING.
B7
MIN. 6" EPDM FLASHING
EPDM
PRIMER
REFER TO APPLICABLE SMACNA (LATEST
EDITION) DETAILS
BONDING ADHESIVE
WATER CUT-OFF MASTIC
SEALANT
WATER CUT-OFF MASTIC
WOOD NAILER
LAP SEALANT
EPDM MEMBRANE
FLEECE-BACKED EPDM
SEE NOTE(S)
APPROVED ADHESIVE
NOTES:
1. REMOVE ALL LEAD AND OTHER FLASHING BEFORE INSTALLING FIELD FABRICATED PIPE SEAL.
2. TEMPERATURE OF PIPE MUST NOT EXCEED 180°F.
3. APPLY EPDM PRIMER TO SPLICE AREA.
4. PRE-MOLDED PIPE FLASHING MUST HAVE INTACT RIB AT THE TOP EDGE REGARDLESS OF PIPE DIAMETER.
5. DECK FLANGES OF THE PRE-MOLDED PIPE SEAL SHALL NOT BE OVERLAPPED, CUT OR APPLIED OVER ANY
ANGLE CHANGE.
6. WHEN A FIELD SPLICE INTERSECTS A PIPE SEAL, APPLY LAP SEALANT ALONG THE EDGE OF THE MEMBRANE
SPLICE COVERING THE EXPOSED SPLICE TAPE 2" IN EACH DIRECTION FROM THE SPLICE INTERSECTION &
OVERLAY WITH A 6"X6" T-JOINT COVER.
7. FIELD FABRICATED PIPE WRAPS MAY BE ACCEPTABLE IF APPROVED BY THE EPDM MANUFACTURER. SEE
INDIVIDUAL MANUFACTURER DETAILS FOR WARRANTED FIELD FABRICATION ASSEMBLY.
1/2" TO 6"
WATER CUT-OFF MASTIC
PRE-MOLDED PRESSURE-SENSITIVE PIPE
SEAL
STAINLESS STEEL CLAMPING RING
PRIMER
FLEECE-BACKED EPDM
APPROVED SUBSTRATE
APPROVED ADHESIVE
DRAWN
DESIGNER
STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/17
/25
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R10
ALASKA REGION
BEGICH, BOGGS
VISITOR CENTER
ROOF
REPLACEMENT
CHUGACH NF
GLACIER RANGER DISTRICT
NEW ROOF DETAILS
CONTINUED
12/2025
E.DUGGER
E.DUGGER
G.BERG
A-06 11 12
NOT TO SCALE
SCUPPER FLASHING
B9
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PIPE FLASHING
B10
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ALUMINUM
CHANNELS
ALUMINUM
CENTER RING
4"
HEAT TRACING CABLE
2'
EXTEND 2' INTO
CONDITIONED SPACE
CHANNELS SHOWN
W/ EXPOSED CABLING FOR
ILLUSTRATIVE PURPOSES
DRAWN
DESIGNER
STAMPS, LOGOS, AND SEALS
PROJECT NAME
DRAWING TITLE
CHECKED
ARCHIVE NO.
DATE
PROJECT NO.
DRAWING SHEET NO.
DATENO.
REVISION / ISSUE
OFSHEET
United States Department of Agriculture Forest Service
/17
/25
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G;
R10
ALASKA REGION
BEGICH, BOGGS
VISITOR CENTER
ROOF
REPLACEMENT
CHUGACH NF
GLACIER RANGER DISTRICT
DRAIN HEATER PLAN
12/2025
E.DUGGER
E.DUGGER
G.BERG
E-01 12 12
NOTES:
1. PROVIDE AN ICE MELT SYSTEM DESIGNED TO KEEP ROOF DRAINS AND ROOF OVERFLOWS FROM FREEZING. IT IS TO
AUTOMATICALLY OPERATE WHEN THE AIR TEMPERATURE AND MOISTURE IS WITHIN A TARGETED RANGE THAT IS TO BE
FULLY ADJUSTABLE BY BUILDING OPERATORS.
2. SYSTEM TO BE DESIGNED AND SUPPLIED AS AN INTEGRATED SYSTEM BY THE SELECTED MANUFACTURER IN
COORDINATION WITH A LICENSED ELECTRICIAN. PROVIDE COMPLETE SHOP DRAWINGS OF ALL COMPONENTS OF THE WORK
WITH LAYOUT DRAWINGS SHOWING LOCATIONS AND CONNECTIONS OF ALL COMPONENTS FOR A FULL AND COMPLETE
OPERATIONAL SYSTEM. DEMONSTRATE OPERATION OF SYSTEM UPON COMPLETION, MAKING SYSTEM ADJUSTMENTS AS
REQUIRED.
3. CONNECT 3-4 DRAIN HEATERS TO A SINGLE 120V, 20A WIRE CIRCUIT, HOME RUN TO PANEL B. EXACT NUMBER OF HEATERS
ON A CIRCUIT WILL DEPEND ON WATTAGE OF SYSTEM AND WILL BE DETERMINED BY A LICENSED ELECTRICIAN AND CABLE
MANUFACTURER TO PREVENT NUISANCE TRIPPING.
4. EXISTING HEAT TRACE CABLING IN THE DRAIN PIPES SHALL BE REMOVED WHERE HEATERS WILL BE INSTALLED. HEAT
TRACE IN THE DRAINS NOT RECEIVING NEW HEATERS SHALL REMAIN FUNCTIONAL AND NOT BE REMOVED.
5. SYSTEM TO CONSIST OF:
a. NECESSARY JUNCTION BOXES, WITH MINIMAL EQUIPMENT/HARDWARE ON THE ROOF DUE TO EXTREME WIND. BOXES
CONNECTED TO BLDG ELECTRICAL PANELS WITH 3- 10 AGW CONDUCTORS PLUS GROUND IN ¾” EMT. UTILIZE EXISTING
HEAT TRACE BOXES AND CONDUIT TO THE GREATEST EXTENT POSSIBLE.
b. HEAT TRACE CONTROLLER: PROVIDE ONE CONTROLLER TO ALLOW BUILDING OPERATORS TO SET DESIRED
TEMPERATURE AND MOISTURE SETTINGS. CONTROLLER TO INCLUDE OPENINGS FOR INPUT POWER, HEATER CABLE
OUTPUT AND SEPARATE OUTPUT FOR TEMPERATURE SENSOR. ALL HEATERS ARE TO BE CONTROLLED BY ONE CENTRAL
UNIT WITH 1-2 ROOF MOUNTED SENSORS.
c. HEAT TRACE CABLE: 120V MULTI SHIELDED HEATER CABLE, 6 WATT PER FOOT AT 40 DEGREES F. SELF REGULATING
HEATING CABLE. CONNECT TO HEAT TRACE CONTROLLER. RUN HEAT CABLE DOWN ROOF DRAIN APPROXIMATELY 24
INCHES.
d. DE-ICING ARRAY AT EACH ROOF DRAIN CONSISTING OF 6 SLIP FIT DE-ICING JIGS AND FRAME FOR ANCHORING HEAT
CABLE WITHOUT PENETRATING ROOF MEMBRANE. ARRAYS MUST BE ABLE TO WITHSTAND 145 MPH WIND SPEED.
015 15 30 FT
ROOF DRAIN
NEW ROOF DRAIN HEATER
NOT TO SCALE
ROOF DRAIN HEATER
E1
1" = 15'
HEATER LOCATIONS
N
PANEL 'B'
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| BBVC Roof Cover Sheet-PLOT |
| Sheets and Views |
| PLOT |
| OLE1 |
| BBVC Roof-SITE |
| Sheets and Views |
| SITE |
| OLE1 |
| BBVC Roof-Ex Roof |
| Sheets and Views |
| Ex Roof |
| OLE1 |
| BBVC Roof-Photos |
| Sheets and Views |
| Photos |
| OLE1 |
| BBVC Roof-Photos (2) |
| Sheets and Views |
| Photos (2) |
| OLE1 |
| BBVC Roof-New Roof |
| Sheets and Views |
| New Roof |
| OLE1 |
| BBVC Roof-Elevations |
| Sheets and Views |
| Elevations |
| OLE1 |
| BBVC Roof-Details |
| Sheets and Views |
| Details |
| OLE1 |
| BBVC Roof-Details (2) |
| Sheets and Views |
| Details (2) |
| OLE1 |
| BBVC Roof-Details (3) |
| Sheets and Views |
| Details (3) |
| OLE1 |
| BBVC Roof-Details (4) |
| Sheets and Views |
| Details (4) |
| OLE1 |
| BBVC Roof-Heaters |
| Sheets and Views |
| Heaters |
| OLE1 |
| Date1_af_date: 1/21/26 | |
| Date2_af_date: 3/2/26 | |
| Date3_af_date: 3/11/26 | |
| 2026-01-21T07:45:24-0900 | |
| ELIJAHU DUGGER |
| 2026-03-02T07:47:45-0900 | |
| GRIFFITH BERG |
| 2026-03-11T15:52:01-0800 | |
| CHRISTOPHER STEWART |
| 2026-03-23T22:30:34-0800 | |
| JENNIFER YOUNGBLOOD |
Date8_af_date:
File details come from the government source that posted it. Updated .