1824 Master Framer Framing Square

• The front side body has a comprehensive Equal Pitched Rafter Table for determining layout of hip and valley roof systems with common pitches ranging from 2/12 to 18/12.
• The front side tongues have Unequal Pitch Rafter Tables for unequal roof systems ranging from 4/12 to 15/12 with a main common pitch of 12/12.
• The back side body has comprehensive Polygon Rafter Tables for both Hexagons and Octagons.
• The backside tongues have Unequal Pitch Rafter Tables for unequal roof systems ranging from 4/12 to 15/12 with a main common pitch of 9/12.

Made of 100% USA sourced 304 stainless steel (no tariffs) with deeply etched markings made for generations of use. You will not find a more versatile and valuable layout tool anywhere.

Save Time—Make Money
Quality work takes time and costs money. With the Chappell Square you will save hours of time on each project simply because it will do away with hours of head-scratching—allowing you to get right to work, complete the job, and get home to your family to finish the treehouse or clubhouse you promised to build with your kids. The time saved, and money made in the first day of use laying out and cutting a compound roof system will likely be greater than the cost of the square, and your kids will be happier for it.
And that's just the beginning!

A wealth of knowledge in the palm of your hand
This 1824 Master Framer features the most expansive set of patented rafter tables and allows for unprecedented layout versatility—allowing you to make every project your masterpiece.

No Batteries, No Brainer
The Chappell Universal Square is not just a square, it is a powerful calculator—and NO Batteries Required!!! With only a pencil and a scrap piece of wood to scribble on, even the first-time builder will be able to layout and cut the most complex, compound roof system. When you're through with your project, simply put it on the shelf and it will be there the next time you need to build a roof system, no recharging, no software upgrades and no batteries required.

Forgot your calculator at home?

No problem!—With the Chappell Square, all you need is a pencil and a scrap piece of wood to make simple multiplication and addition calc's on-the-fly.

Don't know how to use CAD to determine cut angles? Or tired of being bleary eyed from staring at your computer screen trudging through CAD?

No Problem!—The Chappell Square allows you to get right-to-work actually building—no time wasted teasing your mind in abstract thought—as all rotational angles and length factors for virtually any complex roof system are deeply and indelibly etched in easy-to-calculate decimal format into the body and blade. It's as simple to use as a connect the dots drawing for any preschooler.

No Software Upgrades, No Backups and No Batteries Required

Coupled with the rugged 304 Stainless Steel construction, this square will last for scores of generations without ever needing a software upgrade or electric back-up system of any kind.

Never again worry about forgetting what you know or trying to memorize random concepts—the Chappell Square has your back when it comes to building complex roof system.

Just like the Sumerian cuneiform tablets, there's good odds the Chappell Square will be around and functional 6000 years from now—thanks in part to the Made in USA Stainless Steel. No moving parts, no maintenance, and NO UPGRADES REQUIRED.

Whether it be a backyard playhouse or a scale-sized dollhouse for your daughter or granddaughter—or your own dream house—the Chappell Square will put the knowledge you need to build right in the palm of your hand.