Loading

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

Determining Deck Beam Height

In order to determine the correct height for your beam you should first install your ledger board and support posts.  Next you will run a string from the top of the ledger board to the support post with a level and mark the position for the top of the beam.  You will then need to subtract the thickness of the beam and post beam connector hardware.  Finally you should adjust your beam height by factoring in a 1/4" for every 8' pitch to slope away from the house for drainage.  Mark this height with a chalk line and cut your post for the correct beam height.


Popular Framing Articles
Deck Support Columns

How to Decorate Deck Support Columns

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

Deck Framing

Blocking And Bridging

Learn how to strengthen your deck by adding blocking or bridging material at the mid-span of your joists. Blocking can be used to strengthen guardrails.

Deck Framing

Composite Decking Over Concrete: How to Install & DIY Tips

A concrete porch or patio is very difficult to remove. Laying a deck over concrete is a simple way to add a fresh look to your home. Learn more at Decks.com.

Next Step: Decking Articles
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.

Decking Installation

Best Time to Build a Deck

People often wonder when the best time to build a deck is. Learn why building a deck in winter or fall might be your best bet.

Decking Installation

6 Best Alternatives to Wooden Decking

While wood decking was previously considered the standard material for building a deck, that’s changed. Homeowners have been exploring and embracing different types of materials, and the availability of alternative decking materials has grown significantly.

Get more helpful resources delivered right to your inbox

Explore Articles by Topic

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 Support Beams

Determining Deck Beam Height

In order to determine the correct height for your beam you should first install your ledger board and support posts.  Next you will run a string from the top of the ledger board to the support post with a level and mark the position for the top of the beam.  You will then need to subtract the thickness of the beam and post beam connector hardware.  Finally you should adjust your beam height by factoring in a 1/4" for every 8' pitch to slope away from the house for drainage.  Mark this height with a chalk line and cut your post for the correct beam height.


Popular Framing Articles
Deck Support Columns

How to Decorate Deck Support Columns

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

Deck Support Beams

How to Install Flush Deck Headers & Beams

Flush beams are a great solution when space and clearance may be limited. Learn how to install deck headers and flush beams at Decks.com.

Deck Support Columns

How to Use Shared Load Deck Support Posts

Learn how to support an upper and lower deck using one support post and a larger footing by bolting the lower deck into the side of the post.

Next Step: Decking Articles
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.

Decking Installation

Best Time to Build a Deck

People often wonder when the best time to build a deck is. Learn why building a deck in winter or fall might be your best bet.

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.

Get more helpful resources delivered right to your inbox

Explore Articles by Topic