COPYRIGHT PROTECTION & CLIENT RELEASE
This document is protected by copyright registration with the United States Copyright Office.
Unauthorized duplication or use of any text herein is strictly prohibited.
Violators will be prosecuted to the fullest possible extent under Federal Law.
Clients of Bebco Industries, Incorporated are hereby released from the aforementioned
copyright protection, to develop fiberglass building construction specifications.
Industrial Duty Fiberglass Shelter Technical Specifications
1.0 - Fabrication Materials: Industrial Duty Fiberglass Shelters shall be fabricated with materials that meet or exceed the
following specifications:
1.1 - Wall & Roof Section Framing: Perimeter and rib frame members of each individual wall section and the roof section
shall be formed from 18 gauge galvanized steel sheet metal, which has been machine cut and bent to form “C” shape
channels of various widths and depths as specified under Section 2.1.
1.2 - Base Angle: Base angles shall attach wall sections to bottom lift shelters featuring an open, grated, sump or deck style
base. Base angles shall be formed from ASTM A-36 forged angle iron with a minimum profile of 3” x 3” x 1/4”, a minimum
tensile strength of 36,000 PSI and a minimum yield strength of 58,000 PSI.
1.3 - Tubular Framing: Tubular steel shall be utilized as a structural frame surrounding each wall section of top lift shelters,
formed from ASTM A-500 Grade C forged beams with a minimum profile of 3” x 3” x 1/4”W, a minimum tensile strength of
58,000 PSI and a minimum yield strength of 39,000 PSI.
1.4 - Panel Insulation: All wall and roof section frames shall be filled with Dow Chemical Trymer ® Brand 2000-I Rigid
Polyisocyanurate sheeting material, in individual or laminated forms, ranging from 3” thick to 12” thick. Minimum properties
shall include a compressive strength of 25.0 lb/in2, a density of 2.05 lb/ft3, and an R-Value of 5.3 per inch at 75°F, in
accordance with ASTM Test Methods D1621, D1622 and C1303.
1.5 - Resin & Gel Coating Materials: Shelter coatings shall be formed with Reichhold, Incorporated DION FR ® 7767 FlameRetardant Resin and HK Research Corporation WHITE HydroShield ® Light LHM-2900 LOW HAP NPG/ISO (100% NPGIsophthalic) Marine Grade UV Resistant Gel Coating materials, and exhibit the following properties:
Industrial Duty Fiberglass Shelter Coatings Properties
Property
Tensile Strength @ 77°F:
Tensile Modulus @ 77°F:
Tensile Elongation @ 77°F:
Flexural Strength @ 77°F:
Flexural Modulus @ 77°F:
Barcol Hardness @ 77°F:
Heat Distortion:
ASTM Test
D-638
D-638 5
D-638
D-790
D-790
D-2583
D-648
Resin
8,000 psi
40,000 psi
1.6%
14,200 psi
540,000 psi
48
172°F
Gel Coating
11,600 psi
547,000 psi
3.8%
18,450 psi
545,000 psi
35
174 °F
1.6 - Coating Reinforcement & Matting: Coating reinforcement shall consist of Type E gun roving random glass fibers
ranging from 1” to 1.5” in length. Coating over frame members may be reinforced with 0.022” thick BTI Type CM-2415 stitch
fiber matting. Widths shall range from 3” to 6”, as required.
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1.7 - Bolt Fasteners: Wall sections shall be secured to base angles with 3/8” diameter SAE Grade 5 zinc plated steel
carriage head bolts, flat washers, lock washers and hex nuts. The bolts shall have a proof load of 85,000 PSI and a minimum
tensile strength of 120,000 PSI. Length shall range from 4” to 16”, as required.
1.8 - Screw Fasteners: Adjacent wall and roof sections shall be connected with Olympic extra heavy duty #3 Phillips truss
screws, with a 0.435” head diameter, a 0.275” thread diameter and Olympic CR-10 corrosion resistant coating, per FM
Standard 4470. Length shall range from 4” to 16”, as required.
Trymer is a registered trademark of the Dow Chemical Company
DION FR 7767 is a registered trademark of Reichhold, Incorporated
HydroShield is a registered trademark of the HK Research Corporation
2.0 - Section Framing Fabrication & Insulation: Wall and roof section framing shall be formed, prepared, fitted, joined and
insulated in accordance with the following specifications:
2.1 - Wall & Roof Section Frame Forming: Framing members shall be precision cut and formed into “C” shaped channels by
CNC machinery to achieve a minimum flange profile of 1.5” O.D. and a web profile of 3” to 12” I.D. Machining tolerance shall
not exceed a maximum variance of ±0.05”.
2.2 - Wall & Roof Section Frame Preparation: All wall and roof section frame members shall be cut to specific length and
cleaned to remove all scale, oxidation, and surface contaminates, and shall be profiled with a soft-pad grinder to create a
suitable profile for adhesion of gel resin coatings.
2.3 - Wall & Roof Frame Fitting and Joining: Perimeter frame members of all wall and roof sections shall face inward, and
wall and roof section frame ribs shall be formed from two frame members, facing back to back to form an “H” shape. Rib
members shall be joined by 1” long stitch-welds, back to back, on 12” centers, along the entire length of the interior and
exterior flange surfaces. Perimeter frame members shall be notched, fitted and tack-welded. Rib frame members shall be
fitted and seal-welded to intersecting perimeter frame at centers not exceeding twenty four (24) inches, on both exterior flange
surfaces.
2.4 - Insulation Forming & Fitting: Insulation of required thickness shall be precision cut and beveled to fill the voids
between the perimeter and rib frame members of each section. The finished surface of all insulation shall be fitted such that
the exterior surfaces of the insulation and all frame members are flush.
The bottom perimeter frame member shall then be fitted and seal-welded along with all other frame member joints.
2.5 - Roof Section Fabrication: Roof sections shall be fabricated in several distinct styles of gable and shed roof designs.
With specific regard to Low Eave Gable, Low Flush Gable, Eave Shed and Flush Shed Styles, the perimeter and rib frame
members shall be fabricated to form a flat (or level) interior ceiling surface and a pitched (or angled) roof surface. The
Insulation that fills the voids between the frame members shall be laminated and bevel cut, as required, to fill the entire area.
With specific regard to High Eave and Flush Gable Styles, three segments of standard perimeter and rib frame members and
standard sheet insulation shall be utilized to form a triangular shell, with a cavity area that is void of insulation.
2.6 - Top Lift Shelter Tubular Frame Fabrication: Top lift shelters shall be fitted with a tubular steel frame that envelopes all
exterior wall sections. Interior partition wall sections may or may not require tubular steel frames, depending on engineering
requirements for lifting. The tubular steel frame shall be formed from materials as specified under Section 1.3, prepared in the
same manner as wall and roof section framing under Section 2.2, and shall be fitted, squared and seal-welded. Wall sections
shall then be fitted in the tubular steel frame and attached by 1” inch long stitch welds on centers not exceeding 12”, along the
interior and exterior surfaces of each prefabricated wall section’s perimeter frame.
2.7 - Additional Tubular Steel: Additional tubular steel shall be utilized to provide lifting support and structural integrity,
within walls exceeding a length of fourteen (14) feet.
2.8 - Lifting Provisions: Top lift shelters shall feature multiple lifting points for balanced weight load distribution, extending
from the tubular steel frame of opposing long side walls through the roof section’s structure. The tubular steel extensions shall
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be capped by a steel plate of proportional thickness and incorporate a fixed or removable 316 grade stainless steel lifting eye
bolt, rated as required, that is secured by a back-welded hex nut located under the tubular extension cap.
3.0 - Interior Coating Applications: Wall and roof sections shall receive an initial interior surface coating in accordance with
the following specifications:
3.1 - Interior Surface Preparation: Prior to coating application, CAB-O-SIL® fumed silica shall be applied to the interior
surface of all wall and roof sections to fill any insulation sheeting pits and level all surface areas. The application shall be
followed by orbital sanding as required to achieve a smooth surface prior to the coating application.
3.2 - Interior Surface Coatings: The interior surface of all wall and roof sections shall receive two coatings of resin and gun
roving (chop-sprayed) glass fibers, to achieve a minimum thickness of 187 mils (0.1875 inches) ± 10%. Coatings shall be roller
pressed during both applications to remove all trapped air and embed all fibers within the coating strata. The interior surfaces
of all wall and roof sections shall then be orbital sanded as required to remove all protruding fibers and blemishes.
CAB-O-SIL is a registered trademark of the Cabot Corporation
4.0 - Wall & Roof Section Assembly:
specifications:
Wall and roof sections shall be assembled in accordance with the following
4.1 - Bottom Lift Shelter Wall Section Assembly: Wall section assembly shall require a shelter base. Assembly shall be
preceded by attachment of a base angle as specified under Section 1.2, to the perimeter beam or deck plate of the shelter
base. The base angle shall be attached to the shelter base by plug welds, through machine-punched or place-drilled 1/2”
diameter holes on centers not exceeding 12”. The base angle shall then be prepared in the same manner as wall and roof
section framing under Section 2.2. Wall sections shall then be attached to the base angle, utilizing bolt fasteners as specified
under Section 1.7.
4.2 - Top Lift Shelter Wall Section Assembly: Wall section assembly shall be initiated by lifting wall sections into place and
applying tack-welds as needed to square all walls. If a shelter base is included, the bottom of each tubular steel frame shall be
attached to the shelter base with 3” long stitch welds on 12” centers along the interior and exterior sides of each frame. A
shelter base is optional, but exclusion may necessitate removable cross-braces to stabilize walls during transportation.
4.3 - Bottom Lift Shelter Wall Section Joining: Adjacent wall sections shall be joined by screw fasteners as specified under
Section 1.8, on centers not exceeding 12”. Screws shall pass through the first wall’s perimeter frame and be threaded into the
perimeter frame member of the adjoining wall.
4.4 - Top Lift Shelter Wall Joining: Adjacent wall sections (as enveloped by tubular steel frames) shall be joined by 1” long
stitch welds on centers not exceeding 12”, along the interior and exterior sides of an adjacent wall’s tubular steel framing.
4.5 - Roof Section Attachment: Bottom lift shelter roof sections shall be fastened by screws, as specified under Section 1.8.
The screws shall pass through perimeter frame members of the roof section and thread into the top frame members of all
exterior wall sections, on centers not exceeding 12”. Top lift shelter roof sections shall be fitted over all tubular steel
extensions, and shall be joined by 1” long stitch welds on centers not exceeding 12”, at all points of roof section framing
member contact with the exterior wall section tubular steel framing.
5.0 - Finish Coating Applications: Assembled shelters shall receive an interior and exterior finish coating in accordance with
the following specifications:
5.1 - Interior Surface Finish Coating Preparation: Following assembly of the shelter, frame members shall be re-sanded as
required to achieve a suitable profile for adhesion of resin coatings and CAB-O-SIL® fumed silica shall be applied to fill all
joints between the interior surfaces of all wall and roof sections. CAB-O-SIL® fumed silica shall also be applied to fill all joints
between the exterior surfaces of all wall and roof sections, to level all surfaces between frame members, and to fill any
insulation blemishes. The interior and exterior surfaces shall then be lightly sanded, utilizing a combination of soft pad side
grinders and orbital sanders to obtain a smooth finish.
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5.2 - Exterior Glass Fiber & Resin Coating: The exterior surfaces of all wall and roof sections shall receive two coatings of
resin and gun roving (chop-sprayed) glass fibers, to achieve a minimum thickness of 187 mils (0.1875 inches) ± 10%.
Coatings shall be roller pressed during both applications to remove all trapped air and embed all fibers within the coating
strata. The exterior surfaces of all wall and roof sections shall then be orbital sanded as required to remove all protruding
fibers and blemishes.
5.3 - Interior & Exterior Gel Coating: Color of the gel coating shall be specified by the client at time of order. After the
exterior application of glass fiber and resin is fully cured, all interior and exterior surfaces shall receive a roller applied gel
coating to achieve a minimum thickness of 6 mils (0.006 inches) ± 10%. Finish shall then be retouched as required after final
assembly.
6.0 - Special Provisions: The following special provisions shall be applied, as required:
6.1 - Door, Cutout & Special Framing: All door and cutout openings shall be fitted with metal frame members with a
minimum flange width of 1.5”, to accommodate the attachment of door hinges and trim, cutout covers and equipment. Flange
width of frames may be increased and spacing or location may be altered upon request, or to accommodate special design
provisions.
6.2 - Double Wide Shelter Trussing & Roof Bracing: Double wide shelter roofs shall incorporate truss members and be
braced for shipment, dependent on the width and roof style selected.
6.3 - Double Wide Shelter Joining Seals: Sufficient materials and instruction shall be supplied to join and seal the seam of
double wide shelters.
6.4 - Materials of Construction: Wall and roof section frame members, tubular steel framing, base angle and fastener
materials shall be altered upon request to facilitate special design provisions, or to match shelter base material.
7.0 - Lifting & Loading Provisions: Shelters shall be provided with lifting attachment points or forklift pockets, to facilitate
loading, transportation and placement.
7.1 - Bottom Lift Configuration Shelters: Bottom lift shelters shall require a shelter base that shall be provided with
detachable side mounted lifting tees, end mounted lifting extensions or forklift pockets, dependent on weight load factors and
Client preference.
7.2 - Top Lift Configuration Shelters: Top lift shelters shall be supplied with or without a shelter base, and shall be provided
with fixed or removable lifting eye bolts at client’s preference, that are sized dependent on weight and lifting point factors.
8.0 - Shelter Design Load Provisions:
provisions:
All industrial duty fiberglass shelters shall meet or exceed the following load
Industrial Duty Shelter Design Load Provisions
Minimum / Maximum Wind Speeds:
Wind Exposure Level:
Maximum Roof Live (Snow*) Load:
Maximum Concentrated Roof Load:
Maximum Temperature Range:
Seismic Zone Rating:
90 / 150 MPH
C
70 Lbs/Sq Ft
250 Lbs
-40°F to 120°F
4 (UBC)
Exposure Level “C” defined as Flat Terrain with Scattered Obstructions
Snow Load applicable to High Eave & Flush Gable Roof Systems
Seismic Zone Rating per Uniform Building Code
Higher Design Load Provision Ratings available upon request
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