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How to Angle Corners and Joists

A simple way to give your deck a unique expressive quality is to soften square corners by chamfering or clipping the corners. Usually, this is accomplished by positioning 45-degree corners that project 2’ over a cantilevered beam. This framing technique doesn’t require the installation of any extra footings or posts than a deck designed with square corners. You may be required to install footings and posts on the corners if you choose to project more than 2’ past the beam or the decks elevation is too low to position a drop beam below the joists. The corner joints will be formed by two 22.5-degree mitered cut boards.


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Create a free account and get instant & exclusive access to all that Decks.com has to offer:

Checkmark 1,000+ How-To articles
Checkmark 80+ Free Deck Plans
Checkmark Deck Planning Calculators
Checkmark Free & Simple Deck Design Tool
Deck Framing

How to Angle Corners and Joists

A simple way to give your deck a unique expressive quality is to soften square corners by chamfering or clipping the corners. Usually, this is accomplished by positioning 45-degree corners that project 2’ over a cantilevered beam. This framing technique doesn’t require the installation of any extra footings or posts than a deck designed with square corners. You may be required to install footings and posts on the corners if you choose to project more than 2’ past the beam or the decks elevation is too low to position a drop beam below the joists. The corner joints will be formed by two 22.5-degree mitered cut boards.


Popular Framing Articles
Deck Support Columns

How to Decorate Deck Support Columns

Browse some examples of decorative deck support posts for tall decks.

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Beam Span Chart

Learn how to size your deck beam using this easy-to-use span table. Just cross-reference the post spacing and joist length to determine the beam size.

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How to Build a Multi-Level Deck

Multi-level decks are very popular. Learn how to build a deck that steps up or down using shared posts and footing connections.

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Decking Installation

Decking Patterns

Installing your decking at a 45-degree angle is a popular style for decks. This can be done to reduce decking seams or just for appearance.

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Spacing between deck boards provides several critical functions, such as drainage & drying. Learn how to space and stagger deck boards at Decks.com.

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How to Demolish & Remove a Deck

At some point, it might become necessary to remove an old deck, due to age or condition. Learn more about what's involved in a deck demolition and removal project.

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