Roof Framing Geometry: April 2026

RafterTools Updates

RafterTools Books on Geometry, Stereotomy, and Trigonometry.

https://www.raftertools.com/

HG I-II Holy Grail of Roof Framing Geometry & Trigonometry

HG III The Art of the Line for Carpentry Stereotomy Geometry

HG IV Circular Work in Carpentry Stereotomy Geometry

HG V Twisted Circular Work in Carpentry Stereotomy Geometry

HG VI American Trestle Study Pro Stereotomy Geometry

HG VII Building Archimedean Solids and Platonic Solids

RafterTools+ Dark iPhone

Here's a link to the Raftertools+ Dark website: 14 Roof Framing calculators

https://www.raftertools.com/dark/

A comprehensive suite of roof framing calculators covering equal pitch, irregular hip roofs, polygon roofs, timber framing, bay windows, barrel dormers, eyebrow dormers, round towers, elliptical rafters, groin vaults, and more.

In the evolving world of carpentry, mastering roof framing requires precision, deep knowledge, and the right tools. RafterTools+ Dark is designed to elevate both apprentices and seasoned carpenters by providing a comprehensive suite of calculators and resources that ensure confidence and accuracy in every project.

To truly thrive as a professional carpenter today, you need more than top-notch equipment—you need digital support. The RafterTools+ Dark app complements your toolkit, empowering you to transition from apprentice to journeyman or become the most knowledgeable rough-framing carpenter on any jobsite.

Roof Framing Help Desk iPhone

Here's a link to the Roof Framing Help Desk website

https://www.raftertools.com/bot/

Over 300+ Techniques to choose from.

Expertise in Roof Framing Techniques From Around the World

At Roof Framing Help Desk, we specialize in advanced roof framing techniques. Our expertise includes calculating rafter angles for various roof types, ensuring precision, and a knowledge database of keywords linked to web pages, PDF files, and YouTube videos with roof framing techniques.

The Roof Framing Help Desk app is designed to be a community project similar to Wikipedia. Currently, there are more than 300 keywords to search, 150+ webpages, and over 800 drawings.

Whether it's an irregular Hip Roof, Octagon Roof, Polygon Roof, or a Standard Pitched Roof, the Roof Framing Help Desk app can help you with your roof framing techniques.

Roof Framing Help Desk Android

RPN Carpenters Calc iPhone

Here's a link to the RPN Carpenters Calc website

https://www.raftertools.com/dark/carpenter.html

This Carpenter's Calculator is a Reverse Polish Notation (RPN) calculator, typically an engineering or financial calculator that uses postfix notation. However, this calculator is designed for carpenters and builders, and includes functions specific to construction calculations such as rafter lengths, angles, stair calculations, and more. It also includes standard mathematical functions and basic arithmetic operations. The RPN input method allows quick, efficient calculations without parentheses, making it ideal for on-site use where speed and accuracy are important. Example calculations and instructions for using the various functions of the Carpenter's Calculator are provided below.

I've used the HP 48g & HP 50g calculator since the the 1980's for rafter calculations. So, I designed this calculator to have a similar feel and functionality to those calculators, but with a more modern interface and additional functions specific to carpentry and construction.

Stair Tangent Dark iPhone

Here's a link to the Stair Tangent Dark website: 12 stair calculators

Calculators cover stringers, risers, circular stairs, elliptical stairs, winders, arch radius, and more.

https://www.stairtangent.com/

Professional Stair Builders don't need an app to build stairs; they just know how. This app is for rough-frame carpenters who don't build stairs every day but could use a stair-building calculator to check their calculations.

Build a set of stairs that you are gonna be proud of. With Stair Tangent Dark, you can eliminate cumulative math errors when building or constructing stairs.

With the Elliptical Stairs calculations and Ellipse Point Layout for X-Y plotting, you can rival any professional stair builder's capabilities.

Crown Tools Dark iPhone

Here's a link to the Crown Tools Dark website: 15 crown molding calculators

https://www.crownmoldingtools.com/

Crown Tools Dark is an app with functions to calculate complex crown miter and bevel angles that other calculators don't offer.

Crown Molding Miter Angle and Saw Blade Bevel Angles

Cathedral ceiling rake crown molding, miter and bevel angles

Vaulted ceiling rake, crown molding, miter, and bevel angles

Rake Crown Molding Miter and Bevel Angles

Polygon Crown Molding Miter and Bevel Angles

Radius BullNose Crown Molding Miter and Bevel Angles and width

Horizontal to Rake Crown Molding Miter and Bevel Angles

Calculate Crown Molding Spring Angles

Calculate Horizontal to Rake Wall No Transitions

Calculate Rake Wall To Horizontal at Corner Wall No Transitions

Calculate Rake Crown to Rake Crown No Transitions

Calculate Rake To Level No Transitions

Calculate Rake To Level Return No Transitions

Calculate Rake To Rake at Peak No Transitions

Calculate Exterior Rake Molding using 3 Different Crown Molding Profiles

Included with all apps.

Have some fun with the screen animation. Select your own image to animate or use one of the ten included animation .png files. Like dirt bike, windsurfing, speed boat, sail boat, and some carpenters too

Thursday, April 23, 2026