Array Sizing Guide

All Zomeworks fixed racks & trackers are sized according to the total module area.

Length in ft x Width in ft x No. of Modules = Total Area sq. ft.

Or for dimensions in inches:

Length in ft x Width in ft x No. of Modules  ÷ 144 = Total Area in sq. ft.

Choose a Gimbal size with the Maximum Module Area greater or equal to the total area of the modules to be mounted. The names roughly correlate to maximum module area in square feet.

FX2-(3 widths available)

Maximum Module Area

20 square feet

Pole Diameter (Nominal)

2 inch Schedule 40 (minimum)

Crossbar- Telescoping Width Options

FX-S:     17"-26"

FX-L:     26"-40"

FX-XL:  32"-55"

Maximum Rail Length

117 inches (9' 9")

FX3-(3 widths available)

Maximum Module Area

30 square feet

Pole Diameter (Nominal)

3 inch Schedule 40 (minimum) 

Crossbar- Telescoping Width Options

FX-S:     17"-26"
FX-L:     26"-40"
FX-XL:  32"-55"

Maximum Rail Length

117 inches (9' 9")

FX4-(7 widths available)

Maximum Module Area

45 square feet

Pole Diameter (Nominal)

 4 inch Schedule 40 (minimum) 

Crossbar- Telescoping Width Options

FX4-4:        4ft

FX4-5:        5ft

FX4-6:        6ft

FX4-7:        7ft

FX4-8:        8ft

FX4-9:        9ft

FX4-9.5:     9.5ft

Maximum Rail Length

117 inches (9' 9")

FX6-(6 widths available)

Maximum Module Area

65 square feet

Pole Diameter (Nominal)

 6 inch Schedule 40 (minimum) 

Crossbar Width

FX6-6:        6ft

FX6-7:        7ft

FX6-8:        8ft

FX6-9:        9ft

FX6-9.5:     9.5ft

FX6-10:      10ft

Maximum Rail Length

117 inches (9' 9")

FXL-090

Maximum Module Area

90 square feet

Pole Diameter (Nominal)

6 inch Schedule 40 (minimum) 

Maximum Crossbar Width

144” (12ft)

Maximum Rail Length

180 inches (15ft)

FXL-120

Maximum Module Area

120 square feet

Pole Diameter (Nominal)

 6 inch Schedule 40 (minimum) 

Maximum Crossbar Width

144" (12ft)

Maximum Rail Length

192 inches (16ft)

FXL-168

Maximum Module Area

168 square feet

Pole Diameter (Nominal)

 8 inch Schedule 40 (minimum) 

Maximum Crossbar Width

168” (14ft)

Maximum Rail Length

192 inches (16ft)

The area capacity of a rack is driven mainly by wind load considerations, and is based largely on the bending strength of the steel pole and gimbal. Within this area limit, various array shapes are possible, but the maximum area is a limit that must not be exceeded.


It is important to note that while racks have a max crossbar width and max rail length, both maximums cannot be used at the same time. Doing so may exceed the module area limit. We can make the array tall and narrow, or we can make it short and wide. But, we cannot  make it both tall and wide at the same time, even if both width and rail length are within their own limits. The area limit takes precedence over the length limits. If using full width & length together will mount enough modules to exceed the are limit, then choose the next larger model.


Crossbar Size for an array is determined by the spacing of the module mounting holes. There are two different ways of specifying mounting hole location: distance apart, or distance from ends (from the end of the module.) The cross bar does not need to extend to the end of the modules, it only needs to reach far enough to set the rails under the outermost mounting holes.


For the FX2 and FX3, there will only be one column of modules, usually in Landscape, with rails running vertically. Choose the crossbar width the same as distance apart of the mounting holes.


For the FX4 and FX6 (arrays with more than one column of modules). Choose crossbar width by the total width of all modules, minus 2 x the mounting hole distance from ends, plus 2" to accommodate mounting brackets.


Rail Length is simply the total length of modules, accounting for Landscape of Portrait orientation, plus any spaces between, 1/4" spacing is recommended. (The presence or absence of spacing between modules has negligible effect on wind loading, and may be ignored for purposes of module area calculations.)


Note: Nominal sizes of poles are not exact to their names, due to wall thickness and industry naming conventions for "nominal" sizes. For convenience, we refer to a gimbal that fits on a Nominal 6-inch pole as a "6-inch gimbal" (even though neither the pole nor the gimbal is exactly 6 inches).