Feel free to use this specification sheet as a guide for your
next custom building.
FOR DFI'S FIBERGLASS COMPOSITE ENCLOSURES
1.1 A complete fiberglass enclosure assembly shall be furnished and factory
fabricated to nominal dimensions corresponding to those shown on the plans.
1.2 Each enclosure shall be made of integral sections including roof section(s)
and wall sections, with door(s) and hardware completely installed ready
for placement on the selected site. [Alternative phrasing for cartoned buildings:
each enclosure shall be made with ___ integral sections, including ___ wall
sections with door(s) and hardware completely installed and __ roof section(s)
ready for placement on the wall sections. The enclosures shall be crated
to protect the shipment to the job site.]
1.3 Each enclosure's mechanism and accessory items shall be factory installed
to the extent that shipping allows.
1.4 [Note: include only in event of cartoned building] Wall assembly should
require only the positioning of the walls plumb and true, and the application
of a minimum number of stainless-steel fasteners in pre-drilled holes, followed
by a latex or silicon-based caulking at the interior and exterior joints,
all in a workman-like manner. The roof placement shall require squaring
the wall assembly and fastening the roof to the walls with stainless-steel
fasteners through the anchor holes.
1.5 [Note: 1.4 for an assembled building.] The enclosures are anchored to
the ground/floor/pad with wedge anchors (supplied by others) and sealed
with latex or silicon caulking.
1.6 The roof section, if left uncaulked, shall be readily removable for
access to, or replacement of, major equipment protected within the enclosure.
2.0 QUALITY ASSURANCE
2.1 The finished enclosure shall be furnished by Dyer Fiberglass, Inc.,
Dyer, TN, or a qualified, reputable manufacturer experienced in the design
and manufacturing of fiberglass enclosures.
2.2 The enclosure provided shall have been completely assembled at the factory,
prior to shipment. [Note: if building is to be shipped cartoned, add "to
assure proper alignment of all joints, and alignment of fasteners."]
2.3 The enclosure shall be warranted against defects in material and workmanship
for a period of one year.
3.0 CONSTRUCTION DETAILS
3.1 The walls and roof sections shall be of composite construction, comprised
of an inner structural framing and reinforcement materials, polyurethane
foam insulation, and an outer encapsulating fiberglass laminate. Structural
members shall be properly seasoned and selected for uniformity and straightness
and void of holes and irregularities.
3.2 Each wall or roof section shall be completely encapsulated within a
1/8" minimum thickness fiberglass laminate, made up of chemical resistant
polyester thixotropic resin, and reinforced with type "E" glass
(minimum 1" lengths of random chopped roving). The resultant laminate
shall have a glass content of approximately 30% by weight.
3.3 Insulating material shall be modified polyisocyanurate foam of 2-pound
density, spray applied to all cavities and crevices within all designated
insulated areas, incorporating a dead-air space for thermal expansion and
3.4 Each panel's framework reinforcement shall be 1/4" thickness high-density
composites for resultant high-impact resistance of the finished sections.
3/4" plywood may be laminated as necessary to the inside surfaces for
mounting equipment, as the manufacturer or contractor deems necessary.
3.5 All surfaces shall be finished with 15 mil thickness of white pigmented
isophthalic polyester gelcoat with ultraviolet inhibitors, resistant to
weathering and sunlight.
3.6 All fasteners, hardware and hinges shall be stainless steel, aluminum-
3.7 The finished and installed building shall withstand 125 mph windload
and 40 pound-per-square-foot snow load.
3.8 The minimum physical standards for the fiberglass composite structure
Tensile Strength 12,000 PSI
Flexural Strength 20,000 PSI
Water Absorption, % 24 HRS .01%
4.0 INSULATING CAPABILITIES
4.1 Composite materials utilized within the wall and roof sections shall
have an average insulation R-value of approximately 20. (The finished structure
may have a value exceeding R-27, assuming proper workmanship and sealant
is applied during field placement.)
5.0 INSULATING SOUND CAPABILITIES
5.1 The enclosure shall reduce the noise level of the equipment by approximately
8dBa to the outside area. Special modifications may increase the sound blocking
and absorption efficiency.