RFB949700-01 - Drawings.pdf
PDF 1 MB Posted
- Solicitation number
- RFB949700-01
- Issued by
- Buena Vista County, Iowa
About this file
This is a construction drawings document for the Iowa Department of Administrative Services' warehouse roof replacement project at the Independence Mental Health Institute facility located at 2277 Iowa Avenue, Independence, Iowa 50644 (DAS #9497). The project scope encompasses complete removal of the existing roof system over both the main warehouse and canopy structure, with replacement using new 60-millimeter EPDM adhered sheet membrane systems. The existing roofing assemblies consist of metal deck with built-up roof featuring gravel-embedded felts, perlite and fiberboard insulation, and 60-millimeter EPDM. The base bid specifications require installation of new tapered polyiso insulation starting at two-inch thickness at the main roof drain sump with one-eighth inch per foot slope, new coverboard, and 60-millimeter EPDM adhered sheets with 25-year manufacturer warranties. The canopy roof follows similar specifications with tapered polyiso starting at one-inch thickness. The project involves approximately 9,604 square feet of roof area with specific wind design uplift pressures calculated under ASCE 7-22 standards for a 110-mile-per-hour wind speed, with design pressures ranging from 25.3 to 61.2 pounds per square foot depending on field location and corner zones.
The construction documents detail comprehensive requirements including submission of logistic plans, product data, and shop drawings for approval prior to work commencement; compliance with SMACNA and ANSI/SPRI ES-1 standards for sheet metal work; field verification of existing conditions with notification of any discrepancies; mechanical fastening of all insulation layers; continuous wind cleats for sheet metal coping fastened at twelve-inch on-center spacing; licensed electrician performance of all electrical disconnects and reconnects; and contractor responsibility for all local permits, site protection, material storage coordination, barricade installation, and restoration of landscaping to original conditions. The contractor bears full responsibility for roof measurement verification with no additional payment for measurement discrepancies shown on plans, protection of adjacent lawn areas and utilities from damage, and repair of any damage caused by contractor operations at the contractor's expense. All roof access is designated by the owner with material storage located in the parking lot as designated by facility staff.
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GENERAL NOTES
1. PROVIDE ALL SUPPORTING DOCUMENTS INCLUDING SHOP DRAWINGS, LABOR, EQUIPMENT, AND MATERIALS REQUIRED AND SPECIFIED IN THE
CONSTRUCTION DOCUMENTS TO PERFORM THE SCOPE OF WORK.
2. COMPLY WITH ALL APPLICABLE STATE AND FEDERAL CODES AND LAWS. IN ADDITION, COMPLY WITH MANUFACTURER'S GUIDELINES TO OBTAIN
MANUFACTURER'S WARRANTY.
3. SUBMIT LOGISTIC PLAN, PRODUCT DATA, TAPERED PLAN, AND SHOP DRAWINGS TO CONSTRUCTION MANAGER,OWNER AND CONSULTANT FOR
APPROVAL BEFORE STARTING CONSTRUCTION WORK.
4.FIELD VERIFY ALL EXISTING CONDITIONS RELATED TO THE PROJECT SCOPE OF WORK. NOTIFY THE CONSTRUCTION MANAGER, CONSULTANT AND OWNER OF EXISTING CONDITIONS THAT DIFFER FROM THOSE SPECIFIED OR EXISTING CONDITIONS THAT MAY IMPACT THE SCOPE OF
WORK, PERFORMANCE, SCHEDULE, OR PROJECT COSTS.
5. WHERE NEW SHEET METAL COMPONENTS ARE REQUIRED, COMPLY WITH THE FOLLOWING REQUIREMENTS:
A. SHEET METAL WORK IS TO COMPLY WITH SMACNA, ANSI/SPRI ES-1.
B. SHEET METAL COPING IS TO HAVE CONTINUOUS WIND CLEATS FASTENED AT A MINIMUM OF 12" O.C. CLEATS ARE TO BE ONE GAUGE
HEAVIER THAN THE MATERIAL BEING ATTACHED.
C.EXPOSED SHEET METAL EDGES ARE TO BE HEMMED.
D.SHEET METAL RECEIVING AN ELASTOMERIC SEALANT IS TO BE PRIMED AS REQUIRED IN THE MANUFACTURER'S PRINTED SPECIFICATIONS.
SEALANT COLORS ARE TO BE FROM THE MANUFACTURER'S STANDARD COLORS THAT MOST CLOSELY MATCH THE MATERIAL TO WHICH IT
IS APPLIED.
6. CLEAN THE BUILDING, GROUNDS, AND ANY SURROUNDING STRUCTURES AND RESTORE THE LANDSCAPING TO ITS ORIGINAL CONDITION USING
APPROVED MATERIALS.
7. ELECTRICAL DISCONNECTS AND RE-CONNECTS: ALL ELECTRICAL DISCONNECTS AND RE-CONNECTS SHALL BE PERFORMED BY A LICENSED
ELECTRICIAN
8. CONTRACTOR TO PROVIDE BARRICADES, DETOUR SIGNS, AND ORANGE FLEXIBLE FENCING AS REQUIRED AND PROTECTION FOR MATERIALS AND TRAFFIC. MAINTAIN PEDESTRIAN AND OCCUPANT ACCESS AND EGRESS TO AND FROM BUILDINGS AT ALL TIMES.
9. SEE WIND PRESSURE DATA AS WELL AS DIMENSIONS FOR PERIMETER AND CORNER AREAS ON EACH ROOF.
10. ACCESS TO ALL ROOFS FOR CONSTRUCTION SHALL BE AS DESIGNATED BY OWNER. STORAGE AREA FOR MATERIALS SHALL BE IN PARKING
LOT AS DESIGNATED BY FACILITY STAFF.
11. COORDINATE LOCATION OF MATERIAL DEMOLISHED/REMOVED FROM ROOF WITH FACILITY STAFF.
12. DRAWINGS ARE PRODUCED AT 17 x 11 SIZE. ANY SCALE SHOWN IS APPLICABLE WHEN PRINTED AT THIS SIZE. NOTE THAT ROOF DETAILS ARE
NOT SCALED.
13. CONTRACTOR IS RESPONSIBLE FOR ANY AND ALL PERMITS REQUIRED BY LOCAL GOVERNMENTAL AGENCIES.
14. CONTRACTOR RESPONSIBLE FOR PROTECTING EXISTING ADJACENT LAWN AREAS, ABOVE GROUND AND UNDERGROUND UTILITIES, PAVING, AND EXTERIOR BUILDING WALLS FROM DAMAGE.
ANY DAMAGE DUE TO CONTRACTOR OPERATIONS SHALL BE REPAIRED TO MATCH EXISTING CONDITIONS AT CONTRACTOR'S EXPENSE.
15. CONTRACTOR RESPONSIBLE TO VERIFY ALL ROOF MEASUREMENTS. NO ADDITIONAL PAYMENT FOR INCORRECT MEASUREMENTS SHOWN
ON PLANS WILL BE PROVIDED
SITE MAP IMHI WAREHOUSE
INDEPENDENCE MENTAL HEALTH (IMHI) WAREHOUSE
ROOF REPLACEMENT - DAS #9497
WIND DESIGN UPLIFT PRESSURES
ASCE 7-22
Level A - Roof height -12.5 feet Risk Category - II Wind Speed 110 mph Enclosed Building Exposure Surface Roughness B Topo factor =1.0 Ground Elev factor = 1.0
USE
Ultimate Pressures Design pressure (ultimate x 1.2) Field Int - 16 psf 25.3. psf Field Ext.- 28 psf 33.6psf Perimeter - 37 psf 44.4 psf Corner - 51 psf 61.2 psf
Perimeter 0.6 h = 8 feet Corner L shaped 0.2 h - use 4 feet each way (rounded to nearest 4 foot dimension)
Canopy roof - entire roof is corner area with uplift pressure of 61.2 psf
LEVEL A ROOF CONSTRUCTION NOTES
1. EXISTING ROOFING SYSTEM IS AS FOLLOWS :
METAL DECK, BUILT-UP ROOF WITH GRAVEL EMEBEDDED IN FELTS, PERLITE AND FIBERBOARD INSULATION, ASPHALTIC FELT WITH EMBEDDED GRAVEL, FIBERBOARD AND 60 MIL ADHERED EPDM. PROBES INDICATE 2.5 INCHES PERLITE AND 0.5 INCH FIBERBOARD ONE FOOT FROM BOTH THE NORTH AND SOUTH EDGES DIRECTLY UNDER EPDM. INSULATION TYPE AND THICKNESS BELOW BUR NOT VERIFIED. NEAR A ROOF DRAIN 0.5 INCHES
PERLITE AND 0.5 INCH FIBERBOARD DIRECTLY UNDER EPDM. CONTRACTOR TO FIELD VERIFY
INSULATION/ASSEMBLY TYPES AND THICKNESS.
ALL INSULATION MECHANICALLY FASTENED THROUGH INSULATION TO METAL DECK.
2.BASE BID- REMOVE EXISTING MEMBRANE AND INSULATION TO METAL DECK INSTALL NEW TAPERED POLYISO
STARTING AT 2 INCH THICKNESS AT OUTER EDGE OF DRAIN SUMP (8' X8').
TAPERED SLOPE 1/8 INCH PER FOOT SLOPE, MECHANICALLY FASTEN ALL POLYISO INSULATION LAYERS.
INSTALL NEW COVERBOARD IN INSULATION ADHESIVE AND NEW 60 MIL EPDM ADHERED SHEET. PROVIDE 25
YEAR MANUFACTURER'S WARRANTY AND OTHER WARRANTIES AS SPECIFIED.
CANOPY ROOF
CONSTRUCTION NOTES
1.EXISTING ROOFING SYSTEM ON CANOPY ROOF AS FOLLOWS: METAL DECK, BUILT-UP ROOF FELTS WITH
EMBEDDED GRAVEL, 0.5 INCH THICK FIBERBORD AND PERLITE INSULATION THAT VARIES FROM 2.25 INCHES TO
2.75 INCHES THICK AND 60 MIL ADHERED EPDM.
2.BASE BID CANOPY - REMOVE EXISTING MEMBRANE AND INSULATION TO METAL DECK INSTALL NEW TAPERED POLYISO 1/8 INCH PER FOOT SLOPE STARTING AT 1 INCH THICKNESS AT OUTER EDGE OF DRAIN SUMP (4' X4').
INSTALL NEW COVERBOARD FOR MEMBRANE/INSULATION SYSTEM IN INSULATION ADHESIVE AND NEW 60 MIL EPDM ADHERED SHEET. PROVIDE 25 YEAR MANUFACTURER'S WARRANTY AND OTHER WARRANTIES AS
SPECIFIED.
TITLE SHEET
R0
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SHEET TITLE
SHEET NO.
IMHI Warehouse Roof Replacement - DAS #9497
2277 IOWA AVE.,
INDEPENDENCE, IA 50644
PROJECT INFORMATION
52-2797
NOTES:
ISSUED DATE
REVIEWED BY DS
DRAWN BY JBF
DATE
REVISED DATE
I HEREBY CERTIFY THAT THIS DOCUMENT WAS
PREPARED BY ME OR UNDER MY DIRECT
PERSONAL SUPERVISION AND THAT I AM A DULY
CERTIFIED REGISTERED ROOF CONSULTANT BY
THE INTERNATIONAL INSTITUTE OF BUILDING
ENCLOSURE CONSULTANTS
DARRELL SMITH, P.E
20LICENSE NUMBER 11460
PAGES OR SHEETS COVERED BY THIS SEAL
03/16/2026
IMHI ROOF REPLACEMENT
LOCATION
DARRELL L.
SMITH
11460
SHEETS R0-R2, S1
03/16/2026
1 & 1A R2
1 & 1A R2
1 & 1A R2
R2
P
98'-2"
'-2
33'-4" 32'-1"
8' 8'
8'
8'
A
9604 SQFT
R2
R2
R2
4' 4'
R2
R2
1 & 1A R2
18'-4"
4' -2
LEGEND
A
P
ROOF AREA
ROOF DRAIN IN SUMP
PERIMETER ZONE
PLUMBING VENT
FIELD OF ROOF EXTEND
CORNER WIND ZONE
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SHEET TITLE
SHEET NO.
IMHI Warehouse Roof Replacement - DAS #9497
2277 IOWA AVE.,
INDEPENDENCE, IA 50644
PROJECT INFORMATION
52-2797
NOTES:
ISSUED DATE
REVIEWED BY DS
DRAWN BY JBF
DATE
REVISED DATE
1/8" - 1'0"
ROOF PLAN 1
R1
ROOF PLAN
02/26/2026
NEW SEALANT (IF REQUIRED)
NEW PRE-FINISHED SHEET-METAL
GRAVEL STOP
NEW FIELD SHEET
EXTENDED BELOW
BLOCKING
NEW WOOD NAILERS
ATTACHED TO
SUBSTRATE¾OVERALL
THICKNESS TO MATCH
INSULATION, WIDTH TO
MATCH EXISTING
NAILER WIDTH
NEW SELF-ADHERING MEMBRANE FLASHING
(EXTEND APPROX. 2'' BEYOND FLANGE)
APPROX. 2''
NEW BONDING ADHESIVE
SEALANT WATER BLOCK
EXISTING DECK
(METAL - LEVEL A;
WOOD - CANOPY)
NEW TAPERED INSULATION
NEW COVERBOARD
NEW 60 MIL EPDM
NOTE: SEE DETAIL 1A/R2
FOR NAILER ATTACHMENT
NEW CONT.
CLEAT AND
PRE-FINISHED
METAL FASCIA
MIN. 1"
FASTENERS 16" O.C. @
PERIMETER - 10" O.C. @
CORNER ZONES
(FASTENERS REQUIRED
@ LOWEST BLOCK)
1/2"
3/4" FASTENERS @ 3" O.C.
STIFFENER
TAPERED INSULATION SUMP
INSTALL COMPATIBLE SEALANT
BETWEEN DRAIN BOWL FLANGE
AND ROOF MEMBRANE
ROUND CUT IN EPDM MEMBRANE
EXTENDED APPROX. 1'' PAST
CLAMPING RING. HOLE IN MEMBRANE
SHALL BE LARGER THAN DRAIN PIPE
DIAMETER.
EXISTING CAST-IRON DRAIN
BOWL
EXISTING CLAMPING RING
EXISTING METAL ROOF
DECK (LEVEL A), WOOD
DECK (CANOPY ROOF)
EXISTING DRAIN
STRAINER
NEW 60 MIL EPDM
NEW COVERBOARD
NEW TAPERED
INSULATION
2"
4'-0"
TYP. SUMP DIM. 4'-0"
NEW SEALANT (IF
REQUIRED)
NEW PREMANUFACTURED
MEMBRANE FLASHING
INSTALL NEW SEALANT
OR SEALANT TAPE
BETWEEN PIPE AND
PREMANUFACTURED
MEMBRANE FLASHING
EXISTING PLUMBING
VENT STACK
NEW DRAWBAND
NEW SEALANT
BASE MEMBRANE
ATTACHMENT AS
REQUIRED FOR
SPECIFIC SYSTEM
NEW 60 MIL EPDM
NEW COVERBOARD
NEW TAPERED
INSULATION
EXISTING METAL DECK
NEW REINFORCED MEMBRANE
ATTACHMENT STRIP WITH SEAM
PLATES AND FASTENERS
INSTALL NEW COMPATIBLE
SEALANT BEHIND MEMBRANE
NEW TERMINATION BAR FASTENED
WITH APPROPRIATE FASTENERS
APPROX. 12'' O.C.
INSTALL COMPRESSIBLE
ELASTOMERIC SEALANT OR
TAPE TO SPAN IRREGULARITIES
NEW PRE-FINISHED SHEET-METAL
COUNTERFLASHING
INSTALL APPROPRIATE SEALANT
(E.G., POLYURETHANE) AND TOOL
TO FACILITATE WATER RUNOFF
NEW FASTENERS
8' ' M
IN
IM
U M
FL
A
S H
IN
G
H E
IG
H
T
NEW ADHERED MEMBRANE FLASHING
EXISTING MASONRY WALL
NEW 60 MIL EPDM
NEW COVERBOARD
NEW TAPERED INSULATION
EXISTING WOOD DECK21
4"21
4"
P
ER
IM
ET
ER
C
O R
N
ER
S O
.C . S
TA
G
G
ER
ED
NEW 2X6 WOOD
BLOCKING
FOR 2X4 WOOD
BLOCKING CENTER
SCREWS 24" @
PERIMETER, 12" @
CORNER AREA,
STARTING 3" FROM EACH
EDGE - 1 1/4" FROM EACH
EDGE STAGGERED
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SHEET TITLE
SHEET NO.
IMHI Warehouse Roof Replacement - DAS #9497
2277 IOWA AVE.,
INDEPENDENCE, IA 50644
PROJECT INFORMATION
52-2797
NOTES:
ISSUED DATE
REVIEWED BY DS
03/16/2026
DRAWN BY JBF
REVISED DATE
DATE
ROOF DETAILS
ADDENDUM #1
R2
EMBEDDED EDGE-METAL FLASHING1 ROOF DRAIN2
PLUMBING VENT3 BASE FLASHING WITH SURFACE MOUNTED COUNTER-FLASHING AT MASONRY WALL4
BLOCKING ATTACHMENT1A
| Sheets and Views |
| 2797 - IMHI Roof Replacement-R0 |
| 2797 - IMHI Roof Replacement-R1 |
| 2797 - IMHI Roof Replacement_Details-HILL CITY ROOF DETAILS-1 |
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