DIAMOND DESIGN RUBBER STAIR TREADS
No. 626 , GS626, GS626VI
R.C. Musson Rubber Co.
1320 E. Archwood Ave.
P.O. Box 7038
Akron, OH 44306
Tel: (330) 773-7651
(800) 321-2381
Fax: (330) 773-3254
626 TREAD SERIES NOTES
Product Description
No. 626: The Musson No. 626 is a medium gauge Diamond Design
Tread with an extra long 2" Adjusta-Nose nose. They make stairs safer and
are recommended for all but the most heavily used stairways. Diamonds extend
to a 7" (178mm) depth with a 5" (127mm) smooth rear border. This tread
features an extra long 2" (51mm) nosing for concrete-filled metal-pan or
cast-in place concrete stairs. This adjustable nosing will easily adapt
and adhere to steps with return angle nosings between 90 degrees and 60
degrees. Treads are installed using Musson #400 Neoprene Contact Adhesive
applied to back of tread, to back of nosing and to step; and a bead of
Musson #110 Epoxy Nose Caulk inside where nose joins tread. No. 626 treads
are available in the following standard sizes: 36" (914mm), 42" (1066mm),
48"
(1219mm), 54" (1372mm), 60" (1524mm) or 72" (1829mm).
No. GS626: Similar to No. 626 with the addition of two 3/4" (19mm)
wide mineral-coated abrasive Grit-Strip recessed and bonded in machine
ground grooves at the impact point of pedestrian traffic. Grit-Strips are
available in several colors and are replaceable. Any color strip may be
inserted in any of the Grit-Strip treads.
No. GS626VI: Similar to No. 626 with the addition of one
2" (51mm) wide mineral-coated abrasive Grit-Strip for Visually Impaired
persons, recessed and bonded in a machine ground groove at the impact point
of pedestrian traffic. Treads meet the requirements of California State
Standard Code Title 24, Section 2-3306 (R) for the Visually Impaired. Grit-Strip
is available in several colors and is replaceable. Any color strip may
be inserted in any of the Grit-Strip treads.
Available Tread Colors
Musson Standard Color Series I – color extends through entire thickness.
See Musson catalog and color series for color charts. Call Musson
for samples.
Available Grit-Strip Colors
Grit-Strip inserts are available in the following colors: Black,
Yellow, Brown, Gray. Any color may be inserted in the Grit-Strip treads.
Strips are replaceable. Black color strips will be supplied unless specified
otherwise.
See Musson catalog for color charts. Call Musson for samples.
Product Specification
Specifier to select model as required:
A. Furnish and install Musson No. 626 Molded Rubber Diamond Design
Treads, 1/8" (3.2mm) thick, 12-1/4" (317mm) deep with square 2" (51mm)
long molded nose and a 5" (127mm) smooth rear border. Treads nosing shall
be adjustable between 90 degrees and 60 degrees. Treads shall have a sanded
back; contain no asbestos fiber; made of properly cured homogeneous rubber
compound, color extending throughout thickness; free from embedded foreign
material or imperfections which might lessen serviceability. No. 626 Tread
color shall be ______. Standard size tread(s) shall be ______" (___mm).
Install treads using #400 Musson Neoprene Contact Adhesive and #110 Musson
Epoxy Stair Nose Caulking. Treads shall meet Federal Specs. RR-T-650D and
ZZ-T-00-1237 (GSA-FSS).
B. Furnish and install Musson No. GS626 Molded Rubber Diamond Treads,
1/8" (3.2mm) thick, 12-1/4" (317mm) deep with square 2" (51mm) long molded
nose and a 5" (127mm) smooth rear border. Treads nosing shall be adjustable
between 90 degrees and 60 degrees. Treads shall have a sanded back; contain
no asbestos fiber, made of properly cured homogenous rubber compound, color
extending throughout thickness; free from embedded foreign material or
imperfections which might lessen serviceability. Provide two 3/4" (19mm)
wide mineral-coated abrasive Grit-Strip inlaid in machine ground grooves,
1" (25mm) from front edge, spaced 3/4" (19mm) apart. Color of Grit-Strips
shall be ______ (Black furnished unless specified otherwise). Tread color
shall be ______ . Standard size tread shall be ______" (___mm). Install
treads using Musson #400 Neoprene Contact Adhesive and Musson #110 Epoxy
Stair Nose Caulking. Treads shall meet Federal Specs. RR-T-650D and ZZ-T-00-1237
(GSA-FSS).
C. Furnish and install Musson No. GS626VI Molded Rubber Diamond Design
Treads, 1/8" (3.2mm) thick, 12-1/4" (317mm) deep with square 2" (51mm)
long molded nose and 5" (127mm) smooth rear border. Tread nosing shall
have a sanded back; contain no asbestos fiber; made properly cured homogenous
rubber compound, color extending throughout thickness; free from embedded
foreign material or imperfections which might lesson serviceability. Provide
one 2" (51mm) wide mineral-coated abrasive Grit-Strip inlaid in machine
ground groove, 1" (25mm) from front edge. Color of Grit-Strip shall be
______ . Standard size tread shall be ______" (___mm). Install treads using
#400 Musson Neoprene Contact Adhesive and Musson #110 Epoxy Stair Nose
Caulking. Treads shall meet Federal Specs. RR-T-650D and ZZ-T-00-1237 (GSA-FSS).
Specifier to include with tread Specifications
E. Flame Spread Classification: all Musson molded rubber stair treads
meet or surpass the requirements of the following tests:
UL 992 Chamber Test: 2.0 or less
ASTM E-84 Tunnel Test: 75 or less
NFPA 253 C.R.F. Test: .9 Watts/square cm or more
Specifier to include with tread Specifications
F. Physical Properties: all Musson molded rubber stair treads have
been tested under: ASTM D-471, Mil 1-631, ASTM D-624 Die C, ASTM 2240 SHORE
A, ASTM D-2047, ASTM E-662, ASTM E-392-73T and SS312B.