17
Weight and Balance Worksheet
1. Maximum extended length of the keyboard/work surface product:
D=_________ft
2. Total the weight of all fixed and trained service personnel serviceable slide-mounted products:
a=________lbs; b=_________lbs; c=_________lbs; d=_________ lbs; . . .
3. Calculate the moment for both the (M1) and the fixed and trained service personnel serviceable slide-mounted
products (M2) totals from above:
Model M1 M2
1.25 m (not available in graphite)
180 lbs * D ft
220.2 ft-lbs + (a + b + c + d + ....) * 1.00 ft
1.6 m
180 lbs * D ft
246.0 ft-lbs + (a + b + c + d + ....) * 1.00 ft
1.96 m
180 lbs * D ft
271.8 ft-lbs + (a + b + c + d + ....) * 1.00 ft
M1 = Moment of rack with 180 lbs of force applied at D ft.
M2 = Moment of all fixed and trained personnel serviceable slide mounted products.
M2 moment calculations assume a 1.00 ft center of gravity for installed products.
If M1 is less than or equal to M2, no additional counter weight is needed.
If M1 is greater than M2, use the formulas below to determine the required counter weight.
Determine required counter weight if M1 is greater than M2:
Force (in lbs) = M1 - M2 ft-lbs/2.46 = amount of force required at 2.46 ft
X = Force lbs/30 lbs = number of C2790A 30 lbs ballast kits to install, where “X” is rounded up to the next
highest integer, e.g., 1.2 = 2 ballast kits.
CAUTION
The anti-tip feet are not a substitute for ballast.
Ballast Kits available:
Model
Description
C2790A
30 lb. ballast kit (black)
J1479B
120 lb. ballast kit (charcoal)
J4392A
120 lb. ballast kit (graphite)
Chapter 3
Installation Guidelines
