Tech Tip: Cantilever

TECHTIP

The best way to optimize the

cantilever is to start with your

rst rafter and mount. From

there, measure out the exact

distance of the max cantilever

and mark it as the edge of

your array, then continue with

your layout. If desired, after

marking all mount locations,

shift the array over to evenly

split the cantilever.

As a nal check, look

at your layout and ask,

“Without exceeding the

max cantilever, can I shift

this array and eliminate a

mount?” If the answer is

“yes,” do it. If the answer is

“no” congratulations, your

cantilever is optimized!

In some situations, you may

need to stagger mounts, but

you can still optimize your

cantilever on one rail in each

pair.

Case Study: IronRidge XR Offers Superior Spans and Cantilevers

The strength of XR100 Rail allows for a 61 inch max span. Cantilever is 40% of the span, or 24.4

inches. For the same array, competitor A’s max span is 60 inches but their cantilever is limited to 34%

of max span which is 20.4 inches. In this case, rafters are a typical 24 inches apart, so the spans

are limited to 48 inches on both systems, but because XR’s cantilever is 4 inches longer, you can

eliminate an entire column of mounts!

Reduce Costs with IronRidge XR

By maximizing the cantilever across 7 real world arrays and on average, IronRidge required 6 fewer

mounts per install. That is 6 fewer roof penetrations, mounts to purchase and attachments to install.

When comparing the total cost of racking, the Bill of Materials (BOM) for an XR system was 13% less!

It is clear that using a stronger product with longer spans and cantilevers like XR100 and designing

your array to optimize your cantilevers will deliver savings in time and materials!

Not Optimized, 8 Mounts

Optimized, 6 Mounts

Start Here

Shift Array