Endura Flooring Division  

Endura Rubber Stair Tread Specification. CSI 3-Part Specifications.

E N D U R A
D A T A

Until superceded, this bulletin provides important data about Endura RST, the American industry�s finest rubber studded floor tile. lnsert in your Endura folder.

ENDURA RUBBER STAIR TREAD SPECIFICATION

PART 1 - GENERAL

1.01 DEFINITIONS

  1. Chamfered edges will be referred to as the coved sides of the profile which noticeably reduces maintenance. The chamfered edges reduce the collection of dirt at the base of the profile, unlike optional designs which have a dirt-collecting crease line at the bottom of the profile.
  2. Excessive wear shall be referred to as the wearing away on the average of more than .0035" of stair tread material per year.
  3. Fire retardant shall refer to either the critical radiant panel test (ASTM E-648) or the flame spread test - Steiner Tunnel Test (ASTM E-84).
  4. Installer is referred to as construction personnel assigned to install the rubber stair treads.
  5. Migrating waxes will be referred to as waxes and a soil-releasing formulation which are chemically and integrally a component of the product�s formulation. The waxes are activated by use, continual traffic and regular maintenance to the surface of the material.
  6. Non-solvent adhesive will be referred to as adhesive which has a non-solvent base and requires no open time for solvent flash.
  7. Non-flammable adhesive will be referred to as adhesive which does not have a flash point and is classified as non-flammable by its Material Safety Data Sheet.
  8. Stair tread accessories will include riser and stringer materials to be selected from manufacturer�s standard line to match stair tread color selections.

1.02 INSTALLER EXPERIENCE LEVEL

  1. Installer must submit references on past rubber stair tread installations or submit proof of rubber stair tread installation training conducted by manufacturer�s installation training specialist.

1.03 DESCRIPTION OF WORK

  1. Prepare surface of existing stairs or landings in areas indicated in the drawings to receive new rubber stair treads, in accordance with manufacturer�s requirements.
  2. Install rubber stair treads, including manufacturer�s recommended adhesive, in accordance with manufacturer�s requirements.

1.04 DELIVERY, STORAGE, AND HANDLING

  1. All stair treads and accessories are to be stored in a dry, secure area at temperatures specified by the manufacturer.

PART 2 - PRODUCTS

2.01 GENERAL

  1. Components of the rubber floor system are based upon ENDURA specifications to describe function, standards of quality, and material qualities.

2.02 SUBMITTALS

  1. Submit product data, samples, and installation instructions.
  2. Submit two samples approximately 3 x 13 inches in size illustrating color and design.  Samples will be used as a standard of finish and quality for the work.
  3. Submit cleaning and maintenance data.

2.03 WARRANTIES

  1. ENDURA shall provide full one (1) year warranty on materials and workmanship to be free from defects. ENDURA will also warrant their stair treads against excessive wear under normal conditions with a five (5) year limited wear warranty on products.

2.04 MATERIALS

  1. General: ENDURA rubber stair treads shall be made of 100 percent synthetic virgin rubber (no regrind) and of such quality to allow for high resilience and slip retardants, plus finely ground stabilizing fillers, high density of fade-resistant color pigments to enhance color brilliance and color uniformity throughout the material, migrating waxes and soil-releasing agents. These components are blended, calendered and then vulcanized.
  2. Stair Treads must be in full compliance with Federal Specification RRT-650c.
  3. Colors: As selected from ENDURA standard color selection or custom colors. Custom colors require a minimum quantity of 200 stair treads.
  4. Rubber Stair Treads - Physical Properties:
  1. Tread Dimensions:

a. Base gauge:

Round Pattern .130"
Low Vibe Square Pattern .130"
Safety Rib W/Grit Strip .125"
Diamond Pattern .175"

b. Tread depth: All Styles 13.0"

c. Tread Length: Round and Low Vibe

Square Patterns:

Standard Size 4� and 6 �
Optional Special Order Size 3�, 3.5', 5� and 5.5�

Safety Rib and Diamond Patterns:

4� Only

Note: For steps exceeding maximum manufactured stair tread lengths, furnish stair treads in multiple equal length units.

  1. Profile:

a. Coved or Chamfered Sides:   All profiles will be constructed with coved or chamfered sides to assist in the normal brush maintenance, thereby reducing soil collection at the base of the profile.

b. Top Edge:  The top edge or crown of the profile shall be sharp and a precise transition between the top and side of the profile to perform as a squeegee for the removal of foreign substances and fluids from the shoe sole.

  1. Profile Dimensions:

a. Profile Gauge:

Round .050"
Square .040"
Safety Rib .035"
Diamond .075"

b. Top dimension of profile:

Round 11/16" (diameter)
Square 15/16" (diagonal)
Safety Rib ¼ " (width)
Diamond 13/16" (long diag.)

c. Base dimension of profile:

Round 15/16" (diameter)
Square 17/16" (diagonal)
Safety Rib 7/16" (width)
Diamond 27/8" (long diag.)

  1. Stair nose:

a. Nose design: Square nose.
b. Nose depth: Minimum of 1 7/8" from top of tread.
c. Nose must be slightly undercut on the back of the tread at inner radius of stair nose.

  1. All stair treads must have fully sanded backs and nosings.
  2. Traffic level usage: All styles suitable for heavy traffic applications.
  3. Hardness (ASTM D-2240, SHORE A): 87 + 3%.
  4. Tensile strength (ASTM D-412): min. 900 psi.
  5. Elongation (ASTM D-412): min. 200%.
  6. .  Water absorption (ASTM D-570):   less than 0.3%.
  7. .  Initial indentation (Federal Test Method 3221): 60 + 10%.
  8. .  Residual indentation (Federal Test Method 3221): 10 + 5%.
  9. .  Taber abrasion (ASTM C-501) H-18 wheel, 500 gram load, 1,000 cycles.  Less than one gram loss.
  10. .  Slip-resistance (static- coefficient of friction ASTM D-2047): at least one test result should reach or exceed 1.00 on dry   leather soles, and a .90 on foam rubber and solid rubber soles, dry and wet, at random sampling.
  11. .  Critical radiant panel (ASTM E-648):   minimum 1.02 watts - Class 1.
  12. .  Flame spread (ASTM E-84, NBS 75-950, NFPA 253): max. .25 rating - Class A. (Special order - 200 tread minimum.)
  1. Adhesive Phvsical Properties:

Use adhesives as specified in installation instructions:

  1. ENDURA Prene Contact Adhesive 565 a non-flammable adhesive for indoor vertical installations and stair tread installations.

PART 3 - EXECUTION

3.01 STAIR PREPARATION

  1. General: Perform cleaning and preparation of stairs in compliance with ENDURA installation instructions.
  2. Conduct moisture test if stairs are new concrete pan filled steps.
  3. Conduct an adhesion test as recommended.
  4. Cracks, depressions, and rough areas should be cleaned and filled with cementitious leveling compound or ENDURA Bond with no less than 2,500 psi rating when fully cured. Leveling compound must not be gypsum or latex based.

3.02 APPLICATION

  1. General:  Install ENDURA rubber stair treads in strict compliance with installation instructions.
  2. During the period of 24 hours before the installation, the substrate temperature should be at 72°F and must not be colder than 59°F or warmer than 85°F.
  3. Once brought to ambient temperature, install the pre-fitted stair treads and accessories so that all stair treads fit snugly against each step�s nose.
  4. Adhere treads to steps utilizing ENDURA�s recommended adhesives. Proper trowel size must be used. Material must be rolled with roller per installation instructions.

3.03 CURING, CLEANING AND PROTECTION

  1. Immediate foot traffic is permitted after installation of treads using ENDURA PRENE 565 Contact Adhesive. Protect rubber stair treads materials from damage or abuse during construction operations.
  2. After installation, clean rubber stair treads just prior to final inspection using materials and procedures recommended by floor manufacturer.

General: Install ENDURA rubber stair treads in strict compliance with installation instructions.

Two University Office Park, Sawyer Road, Waltham, MA 02254/Phone (617) 647-5375/Fax (617) 647-4543

 

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