GRATING
1. Description
a. Aluminum:
– ALUMINUM FLUSH TOP
SGF Series
– Aluminum Rectangular
Bar SG Series
– Aluminum I-Bar SGI
Series
– Aluminum Dove Tail
ADT Series
– Aluminum Riveted AR
Series
– Aluminum Plank
Series
b. Heavy Duty Steel
– Heavy Duty Welded
Steel W Series
– Heavy Duty Welded
Steel WH Series
– Heavy Duty Riveted
Steel R Series
c. Light Duty Steel
– Welded Carbon Steel W
Series
– Dove Tail Carbon
Steel DT Series
– Swaged Carbon Steel
SGCS Series
– Swaged Stainless
Steel SGSS Series
– Riveted Carbon Steel
R Series
2. Size and Type (Bar grating):
a. Bearing bar size
b. Bearing bar spacing, center-to-center
(face-to-face for riveted grating)
c. Cross bar or rivet spacing,
center-to-center
3. Surface
a. Plain
b. Serrated
c. Striated (I-Bar)
d. Slip Resistant Surface
4. Size and Punch/Pattern (Aluminum Plank grating):
a. Plank size and type
b. Unpunched
c. Rectangular Punched
– Upset Pattern (OGI)
– Upset Pattern
(WACO)
– Plain Pattern d.
Square Punched
– Upset Pattern
– Plain Pattern
e. Round Punched
– 13/16½ Diameter
In-Line Pattern
– 1½ Diameter
Staggered Pattern
5. A drawing (if layout is complicated) showing:
a. Area to be covered
b. Span (direction of bearing bars)
c. Method of support
d. All critical dimensions
e. Banding or toeplate
6. Type of Anchorage
a. Grating clamp
b. Plank clip
c. Saddle clip
d. Anchor block
e. Countersunk land (aluminum only)
f. Tack weld
g. Z clip
h. Plank lug
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7. Finish:
a. Aluminum:
– Mill Finish
– Cleaned &
Etched
– A-31 1/2 hour Clear
Anodizing
– A-41 1 hour Clear
Anodizing
b. Carbon Steel
– Mill Finish
– Manufacturer’s
Standard Black Paint
– Galvanized
c. Stainless Steel
– Mill Finish
– Sandblast (used to
help minimize the discoloration caused by welding Heavy Duty
Stainless Steel grating)
STAIR TREADS
1. Description: See Grating, Item 1
2. Size and Type (Bar grating): See Grating, Item 2
3. Surface: See Grating, Item 3
4. Size and Punch/Pattern (Aluminum Plank grating):
a. See Grating, Item 4
b. Type “F”
5. Type of Nosing
a. Checker plate – standard for carbon steel
treads
b. Cast aluminum – an abrasive nosing available
on aluminum, carbon steel or stainless steel treads
c. Grooved – an extruded nosing standard on
aluminum treads
d. Slip-Not – a special nose for aluminum or
carbon steel treads by request
6. Dimensions
a. Width of tread, including nosing
b. Span (length of bearing bars)
c. End plate dimensions “A” and “B” (see page 105)
7. Number of treads
8. Finish: See Grating, Item 7
ALUMINUM GRATING
FRAMES
1. Frame Size (corresponds with grating size)
2. Description
a. Stock lengths
b. A detailed drawing or accurate measurements for fabricated
frames
3. Supplementary anchor straps and spacing, if required 4.
Finish
a. Mill Finish
b. Bituminous Paint
5. Nail holes and location, if required
Note: Grating should always be held down by
some positive means. See Anchoring Devices.
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