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Simplified Load and Pitch Limit Charts
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Simplified Load Limit and Pitch Angle Tables
The following charts list configurations of modules that have been calculated to not exceed the working load limits of any module or any
array frame component, based on the parameters specified. The charts also provide suggested pickup points in the array frames for
various desired array pitch angles, along with the maximum downward pitch (negative number) for the frame and module combinations.
For module configurations not listed below, please contact your local Bose Field Engineer or Technical Support Specialist.
How to Read the Charts: The charts below are grouped by the number of modules in each array. Each table contains information for
a specific combination of modules defined by vertical coverage and listed in the first column of each table. For example, the first table
below lists a 2-module with sub configuration with a 40° total vertical angle, consisting of a RMS215 subwoofer module in the first
position, an RMxx20 module (module with any horizontal and 20° vertical coverage), and another RMxx20 module in the third position.
The second column lists the desired, or target, pitch of the entire array, as referenced from the top surface plane of the array frame,
with angles pitched down from horizontal listed as negative numbers (see Simplified Chart Notes on page 14). For each listed "Desired
Pitch" angle, read across the chart to determine the calculated pickup points in the left and right rails of the array frame. The right-most
column lists the calculated pitch angle for the listed pickup points. When the maximum pitch angle has been reached for the specified
array configuration, the table will list "n/a" for the pickup point and predicted pitch values.
Prediction Accuracy: To confirm the accuracy of the predicted pitch angles, we tested both the Small Array Frame and Large Array
Frame to compare actual constructed array pitch angles versus the predicted values. The testing revealed an accuracy of 96% using a
tolerance of 2.0 degrees from predicted value. Many factors contribute to the variation including manufacturing tolerance Therefore, we
always recommend confirming the array pitch during installation with an inclinometer, and making adjustments in the predicted pickup
point as required.
Array Frame Pickup Point Reference: The pickup point for array frames is always referenced to the shackle holes for the left and right
rails. The center rail of the array frames is intended only for temporary attachment and has a different hole pattern as compared to the
left and right rails. The shackle holes on each rail have a top and bottom position. However, the pickup point positions are numbered
sequentially from 1 to 32 for the Large Frame and 1 to 33 for the Small Frame, without reference to the top or bottom positions. Both left
and right rails have a label that identifies the starting point of the pickup position numbering and direction of increment. The label does
not contain numbering for every single position. Note: Do not use pickup point reference numbering for center rail!
Extender Bar Pickup Point Reference: The pickup point reference for the Extender Bars starts with 1 number greater than the last
number of the Large Array Frame. Thus, the first pickup point reference number for the Extender Bars is 33. See Figure 9.
Figure 9. Array Frame and Extender Bar Pickup Point Numbering Reference
Installation and Safety Guidelines
Page 11
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