Highly valued at industrial and commercial buildings, natural lighting contributes to better work conditions, lower energy costs, and safety. For years, translucent, reinforced plastic panels have been used to provide low cost, transmission of natural light.

Today, Enduro Systems offers DuroLite, day lighting panels that deliver value beyond traditional reinforced plastics:

Safety and leak protection
Retention of light transmitting properties
Retention of color and aesthetic benefits

DuroLite fiberglass, roofing and siding panels are manufactured in several profiles matching common metal and aluminum shapes. They are installed in continuous bands or as individual units interspersed among metal or fiberglass materials. They are available in clear and translucent colors and transmit soft, diffused, natural lighting.
 
Safety and Leak Protection

With DuroLite, building owners and designers get superior structural performance along with low cost, natural lighting. Designed to withstand hurricane force winds, the materials are much stronger and stiffer than either chopped strand or woven reinforced plastic panels of similar weight. The source of DuroLite strength is its higher reinforcing content (47% of its weight) and the use of straight, continuous glass fiber reinforcements. The roofing and siding panels support greater loads with less deflection and prevent costly, annoying leaks and panel blow offs. In addition, the materials provide safer support for installers (contact Enduro for guidelines).

 
Retention of Color and Light Transmission
Old style reinforced plastic panels are prone to discoloration and clouding which has a negative impact on building appearance and light transmitting properties. Using today’s advancements in UV protection, fiberglass panels retain their color and light transmitting properties much longer.

DuroLite construction takes full advantage of these advancements. The polyester resin used in DuroLite panels includes the additive, neopentyl glycol, critical for effective UV protection. In addition, an acrylic polymer coating, Hetrolac, can be shop applied for important, added protection at minimal added cost. It is important to include these added value features in project specifications.

 
Applications
DuroLite panels are designed for commercial and industrial application. They are furnished with Class I Flame Spread Rating of 25 or less or as a non-fire rated material. With corrosion resistance superior to protected metal, DuroLite panels are durable and stand up to tough, industrial conditions, however, they are not intended for aggressive chemical exposures. For these applications, Enduro manufactures and recommends Tuff Span fiberglass panels and its proven performance.

DuroLite roofing and siding panels are ideal for use in fabrication and assembly plants; warehouse and port facilities; and commercial buildings. Applications where low cost, natural lighting with reliable structural performance has value. Transparent to electronic frequencies, they are also used in place of metal to reduce electronic or radio frequency interference or to enclose microwave equipment. Please contact Enduro for assistance with either DuroLite or Tuff Span building panels.

 
DuroLite Description
Series 150 250 300
Nominal Wt. - Oz/SF 8 10 12
Nominal Glass Content 47% 47% 47%
Standard Colors/Light Transmission:
Trans Clear 80% 75% 70%
Trans White 40% 35% 30%
Trans Green Mist 50% 45% 40%
Trans Gray Mist 50% 45% 40%
Trans Blue Mist 40% 35% 30%
 
Designing with Fiberglass Panels
Specifiers should set the span to deflection (L/D) ratio at a high level to prevent building leaks and to keep fiberglass panels from being damaged or blown off in high winds. In many cases, chopped strand fiberglass panels have been installed (with the manufacturer’s endorsement) with a L/D limit as low as 20. This is a deflection of 3” on a 5’0” span and not a reliable, structural design. Panel deflection of this magnitude can lead to fastener hole enlargement or breaking of seals between panels resulting in building leaks or panel blow offs. In consideration, Enduro strongly recommends that fiberglass panel specifications include a minimum L/D ratio of 60 for fiberglass roofing and 30 for siding and higher when feasible.
 

Specifications: Fiberglass Reinforced
Plastic Day Lighting Panels

Part 1 - General
  1.01 General Description
The scope of this specification is intended to cover roof and/or wall units and required accessories shown
on the drawings. This includes but is not limited to: Fiberglass Reinforced Plastic (FRP) translucent roofing
and siding panels
Part 2 - Products
  2.10 Materials and Finishes
A. Roofing and siding units shall be DuroLite as manufactured by Enduro Systems,Inc. or approved equal that conforms to these specifications.
    1. Resin type shall be polyester, UV stabilized.
    2. Glass Fiber Reinforcements shall be straight and continuous, with fibers oriented in two directions
(along the length and width of unit). Glass content shall be a minimum of 47% by weight.
    3. Materials shall have be:
    Class 1 flame spread rated (25 or less) per ASTM E-84
    Non-fire rated
    4. Panel materials shall be protected from UV rays with:
    UV-stabilized resin with neopentyl glycol and acrylic monomer.
    Shop-applied, acrylic polymer coating on the UV exposed surface to inhibit color fade and loss
of light transmission properties.
    5. Translucent color shall be clear or Enduro standard or as selected by owner.
    6. Light transmission through panels shall be minimum of
    % per ASTM D-1494.
  2.20 Structural Parameters
  A. Cladding panels shall meet the performance criteria described below for spans indicated on the drawings. Product compliance shall be established by large scale ASTM Test E-72 for positive and negative loading.
Application
Uniform Load Deflection Limit Factor of Safety
Roofing:
____PSF Positive L/D = 60 2.5
  ____PSF Negative L/D = 60 1.88
Siding:
____PSF Positive L/D = 30 1.88
  ____PSF Negative L/D = 30 1.88
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