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Heavy Duty Grating Calculator
Load Definitions
AMICO BAR GRATING CALCULATOR
WELDED HEAVY DUTY GRATING
Input
Grating Options**
Enter design parameters in the yellow fields below.
Style
Bearing bar size
Approximate weight
Section modulus*
Moment of inertia*
(in)
(psf)
(in
3
)
(in
4
)
Material
-Please Select-
A36 steel
SS 304L, 316L
SS 304, 316
""
Allowable Stress
psi
""
Bearing bar spacing
38
30
22
19
15
/16in
""
Cross rod/bar spacing
2
4
in.
Grating surface
Serrated
Plain
Clear Span
in.
Vehicular load
Click on the tab "Load Definition" at the top
of the page for vehicular load descriptions.
H-25 Truck
H-20 Truck
H-15 Truck
Passenger Vehicle
5-ton Forklift
3-ton Forklift
1-ton Forklift
None
Special Loads
(tab above)
Allowable deflection under vehicle load
Per NAAMM MBG 532--The lesser of L/400 and 1/8in.
in.
""
Uniform load, U
psf
* Per foot of grating width.
Concentrated load*, C
lbf
** All grating options shown on this list meet NAAMM MBG 532 strength and deflection requirements. Horizontal support must be properly designed for especially when span exceeds 8ft.
Allowable deflection D due to U and C
in.
Contact AMICO
""
800-366-2642
E-mail
Web
© 2013 Alabama Metal Industries Corp. All rights reserved.
NAAMM MBG 532 Standard Vehicular Loads
Load types
H-25 truck
H-20 truck
H-15 truck
Passenger vehicle
5-ton forklift
3-ton forklift
1-ton forklift
Vehicle weight (lbs)
6,322
14,400
9,800
4,200
Load capacity (lbs)
3,578
10,000
6,000
2,000
% of load on drive axle
60%
85%
85%
85%
Axle load (lbs)
40,000
32,000
24,000
5,940
20,740
13,430
5,270
Tire load
20,000
16,000
12,000
2,970
10,370
6,715
2,635
Tire load plus 30% impact factor (lbs)
26,000
20,800
15,600
3,861
13,481
8,730
3,426
Length of tire load distribution
bearing bar direction
25
20
15
9
11
7
4
Cross-rod/bar direction
25*
20*
15*
9*
11*
7*
4*
* plus 2 times the center-to-center spacing of bearing bars.
The allowable deflection under the vehicular loads shown above is the lesser of L/400 and 1/8in.
For other load cases, please contact AMICO for assistance.
Uniform load, U
Concentrated load, C
Contact AMICO
800-366-2642
E-mail
Web
© 2013 Alabama Metal Industries Corp. All rights reserved.