Specifications
PART 1 GENERAL E. Any products claiming to be a similar, like, or equal must demonstrate
(meet or exceed) the same physical and performance characteristics as
1.01 SECTION INCLUDES specified below:
A. The work covered by this specification consists of furnishing all labor, 1. Density: 0.52 oz/cu in ASTM D575
equipment, materials and accessories, and performing all operations required 2. Durometer Hardness: 67.2A ± 1 ASTM D575
for the correct installation of recycled rubber pipe [conduit] supports for
3. Tensile Strength: 231 psi minimum ASTM D575
mechanical piping [electrical conduit] systems.
4. Compression Deformation: 5% at 70psi and 72ºF ASTM D575
1.02 REFERENCES 5. Brittleness at Low Temp: -50ºF ASTM D746
A. ASTM A653 G90 SS Gr. 33 - Specification for Steel Sheet, Zinc Coated 6. Weathering: 70 hours at 120ºF ASTM D573
(Galvanized) by the Hot Dipped Process a. Hardness retained: 100% (±5%)
B. ASTM B633 - Specification for Electrodeposited Coatings of Zinc on Iron b. Compressive strength: 100% (±5%)
and Steel c. Tensile strength: 100% (±5%)
C. ASTM C531 – Test Method for Linear Shrinkage and Coefficient of Thermal d. Elongation retained: 100% (±5%)
Expansion of Chemical Resistant Mortars, Grouts, Monolithic Surfaces, and
Polymer Concretes 2.03 TYPE OF ROOFTOP SUPPORTS
D. ASTM C642 – Test Method for Specific Gravity, Absorption, and Voids in A. Rubber block supports – DURA-BLOK™ model # [DBP] [DMB] base dimensions:
Hardened Concrete 6-inch wide by 4-inch tall by [9.6] [4.8]-inch length. Accessories are fastened
E. ASTM C672 – Test Methods for Scaling Resistance of Concrete Surfaces directly into rubber material with weather resistant type 12 lag screws.
Exposed to Deicing Chemicals B. Continuous block channel supports – DURA-BLOK DB Series or DB6 Series:
F. ASTM D412 – Test Methods for Vulcanized Rubber and Thermoplastic Dimensions 6-inch wide bt [5.0] [6.5]-inch tall bt [9.6] [20.2] [30.8] [41.4] [52.0]-
Elastomers – Tension inch length. Assembly has 1" gaps between blocks for free flow of water.
Standard strut accessories can be used for attachment.
G. ASTM D395 – Standard Test Methods for Rubber Property – Compression Set
C. Bridge channel supports – DURA-BLOK DB10 Series; Dimensions 6-inch wide
H. ASTM D573 – Test Method for Rubber – Deterioration in an Air Oven
by 55⁄8 -inch tall by [28.0] [36.0] [42.0] [50.0] [60.0]-inch length. Standard strut
I. ASTM D746 – Test Method for Brittleness Temperature of Plastics and accessories can be used for attachment.
Elastomers by Impact D. Extendible height support – DURA-BLOK model DBE 10-[8][12][16], height to
J. ASTM D2240 – Test Method for Rubber Property – Durometer Hardness suit application: 8-inch, 12-inch or 16-inch (200 pound maximum load). Base to
K. NFPA 70 – National Electrical Code be 9.6 inches in length or otherwise specified sizes available. Heavier loads,
may require CLDP load distribution plate.
1.03 QUALITY ASSURANCE E. Roller supports– DURA-BLOK DBR10 Series & DBR Series: DBR10 Series
A. Rubber / steel pipe supports shall be manufactured under a strict quality is sized for pipe up to 31⁄2 inches, with vertical adjustment up to 12 inches.
control program assuring quality product delivered to the jobsite. Pipe DBR Series is sized for [2-31⁄2] [4-6] [8-10] [12-14] [16-20]-inch pipe sizes.
supports that are damaged shall not be installed. F. Elevated single pipe supports– DURA-BLOK DBM Series: [Copper] or [Steel]
B. Workmanship: All pipe [conduit] supports to be installed by a qualified piping pipe sizes [1⁄2] [3⁄4] [1] [11⁄4] [11⁄2] [2]-inch.
[electrical] contractor and installed in accordance with manufacturer’s
recommendations. PART 3 EXECUTION
1. All work shall comply with all applicable federal, state, and local codes and
laws having jurisdiction. 3.01 INSTALLATION
2. All work shall conform to accepted industry and trade standards for pipe A. Install in accordance with manufacturer’s instructions and recommendations.
support [conduit] installations.
B. If gravel top roof, gravel must be removed around and under pipe support.
C. Always consult roofing manufacturer for roof membrane compression
PART 2 PRODUCTS capacities. If necessary, a compatible sheet of roofing material (rubber pad)
may be installed under rooftop support to disperse concentrated loads and
2.01 ACCEPTABLE MANUFACTURERS
add further membrane protection.
A. Manufacturer: Subject to compliance with these specifications, pipe support
systems shall be DURA-BLOK™ design as supplied by Eaton [or engineer D. Gas pipe spacing subject to local gas authorities.
approved equal]. E. Use properly sized clamps to suit pipe [conduit] sizes.
2.02 MATERIALS
A. Curb base must be made of 100% recycled rubber and polyurethane
prepolymer with a uniform load capacity of 500 pounds per linear foot of
support.* In addition, each base to have a reflective red stripe. (*See 3.01(C))
B. Dimensions: 6-inches wide by [4] [5.0] [6.75] inches tall by [9.6] [20.2] [30.8]
[41.4] [52.0] inches long.
C. Steel frame: Steel, strut galvanized per ASTM A653 or strut galvanized per ASTM
A653 for bridge series.
D. Attaching hardware: Zinc-plated threaded rod, nuts and attaching hardware
per ASTM B633.
EATON DURA-BLOK rooftop supports 7
