RSI 7 & RSI 12 RAFTER SQUARES

Words: Mason Contractors

AURORA, Illinois, April 4th, 2023: SOLA is launching two rafter squares in North America with edge lengths of 7 inches (RSI 7) and 12 inches (RSI 12). Both rafter squares are in the shape of an isosceles right-angled triangle with a T-edge on one leg and they combine the features of a ruler, try square, miter square, angle meter, and a rafter measurer. In addition, they can be used as a scribing tool or a saw guide, thanks to their durable edge. Made from aluminum, the rafter squares are lightweight, yet robust and durable.

The RSI 7 rafter square from SOLA with metric scale has an edge length of 7".


The RSI 12 rafter square from SOLA with metric scale has an edge length of 12".


Ideal for Marking and Measuring

The SOLA rafter squares are true multifunction tools thanks to the number of recesses and imperial scales on both sides, making them ideal for marking lines and angles. The offset scale beneath the T-edge means lines can be marked perpendicular to the T-edge. If you are looking to mark or scribe parallel lines with a pencil, use the 1/4-inch spaced scribing notches.

 

0—90° Angle Measurer

If the rafter square is placed with the T-edge on the rafter or workpiece, you can quickly and easily mark or check a 45° or 90° angle. Any angle between 0° and 90° can be measured using the degree scale on the hypotenuse of the rafter square. To do this, simply rotate the rafter square around the pivot point to the desired angle on the degree scale.

 

Rapid Marking of Miter Cuts

The different scales and recesses of rafter squares are primarily designed for use with wood — be this during carpentry, joinery, or woodwork. Rafter squares are an essential item in any carpenter’s toolbox–especially during roof and rafter construction. As well as the degree scale, they also have a recess with two special scales for marking common, hip, and valley rafters. In addition, the SOLA rafter squares have a 90° marking aid for rafter seat cuts.

 

Robust and Durable

SOLA rafter squares are made from lightweight aluminum and will provide years of use thanks to their robustness and durability. The scales on both sides are laser-cut, dazzle-proof, and have enhanced contrast, which means you can quickly and comfortably read off measurement results.




The durable edge means the rafter square from SOLA can be used as a saw guide.

From Idea to Jobsite: Inside EZG’s R&D Process
May 2026

In the masonry industry, equipment is rarely developed in isolation. The most effective tools are shaped by real jobsite challenges and refined through contractor feedback. At EZG Manufacturing, research and development is a hands-on, iterative process th

Announcing The MASONRY STRONG Network™
May 2026

The Mason Contractors Association of America (MCAA) is proud to announce the MASONRY STRONG Network, a video-first multimedia platform. This marks the next chapter for the Association’s MASONRY, the brand that has informed and connected the trade for over

Manufactured Stone Veneer or Thin-Cut Natural Stone: Which One is Right for Your Next Project?
May 2026

Stone continues to be a go-to material in both residential and commercial construction, used for its texture, depth and ability to elevate a façade or interior space. For masons, general contractors, builders and design professionals looking for lightweig

Celebrating Craftsmanship and Country
May 2026

The 250th anniversary of the United States is more than a date. It is a reflection of centuries of progress, innovation, and determination. STABILA has chosen to mark this milestone with a product that mirrors those same qualities. The Patriot Series Maso