][2.5.1.2
Precast Concrete/Cast Stone Units
Provide reinforced precast concrete units consisting of a mixture of
cement, aggregates and mineral colors suitable for exterior use, located as
shown on the drawings.
a.
Design benches to sustain a live load of not less than 10 kPa 200
pounds per square foot.
b.
Portland cement:
ASTM C 150 Type I II or III.
c.
Aggregate:
ASTM C 33, maximum size 19 mm 3/4 inch.
d.
Reinforcing steel:
ASTM A 615/A 615M.
e.
Galvanized wire mesh:
ASTM A 185.
f.
Integral color:
ASTM C 979, pure mineral oxide, limeproof and
non-fading.
g.
Provide minimum 35 MPa 5000 psi 28 day compressive strength
concrete, maximum five percent absorption.
h.
Admixture:
ASTM C 260 for air-entraining.
]][2.5.2
Wood Units
Provide manufacturer's standard wood units with wood, metal, fiberglass or
concrete pedestals as indicated. Provide fasteners and accessories
required for onsite assembly. Kiln dry and pressure treat wood components
to manufacturer's standards. Pre-treat metal components and provide
manufacturer's standard primer and powder coat finish complying with ASTM D
3451, color as selected. Provide fiberglass non-fading gel coat color as
indicated. Provide manufacturer's standard exposed aggregate or
sandblasted finish and protection coating on concrete pedestals.
a.
Design wood benches to sustain a live load of not less than 10 kPa
200 pounds per square foot.
b.
Provide kiln dried, surfaced four sides (S4S), clear all sides
wood slats of species and sizes indicated.
(1) Species: [Teakwood] [Marine Teak] [Clear All Heart Redwood]
[Red Cedar] [Alaska Yellow Cedar] [Clear Douglas Fir] [Ipe]
[Mahogany] [Purple Heart].
(2) Nominal wood slat sizes: 25 by 63 mm 1 by 2 1/2 inch [25 by
75 mm 1 by 3 inch] [50 by 75 mm 2 by 3 inch] [50 by 100 mm 2 by 4
inch]. Top and bottom rail may be larger in size and
configuration for comfort of seating.
]2.5.2.1
Support Pedestals
Provide [cast iron] [cast aluminum] [steel] [wood] [concrete] [fiberglass]
support pedestals as per manufacturer's standard.
a.
Cast grey iron: ASTM A 48/A 48M Class 30 or recycled cast grey
iron ASTM A 48/A 48M Class 25.
SECTION 02870
Page 19
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