HOW-TO GUIDES

How to Build and Frame a Multi-Level Deck

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Explore instructions for building and framing a multi-level deck, from tips on freestanding vs connected styles to how to build your transition box steps.

 

Disclaimer: Instructions provided by Trex® are based on the build specifications that Trex® demonstrated in the Trex® Academy video series and are not universal to all homeowners’ projects. A homeowner’s build may vary from Trex’s instructions based on the homeowner’s local municipality requirements, individual design preference and project specifications. For questions or assistance needed during your project, please reach out to howto@trex.com

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For any home project, be certain to follow local code and permitting requirements.
© 2022 Trex Company, Inc.
01. Intro 00:00
02. Determine Functional Areas of the Deck 00:23
03. Framing Considerations 01:35
04. Installing Joists 03:25
05. Transition Box Step 03:48

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Step-by-Step Instructions
Chapter 01: Planning Multi-Level Deck
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So you're ready to get started? Watch our how-to tutorial before you start your build.

Before you begin any DIY project, make sure to wear the appropriate personal safety equipment. Eye protection, ear protection, gloves, long pants, a long-sleeved shirt, and reinforced toe shoes are recommended. Always make sure that you have a first aid kit nearby. For any home project, be certain to follow local code and permitting requirements. 

For homeowners looking to add layers of design to their space, multi-level decks offer a functional and stylish solution. Multi-level decks create distinct spaces in your backyard, as each level can be used for a unique purpose such as entertainment, cooking, and smaller group sitting areas. If your yard is sloped, multi-level decks can also follow the slope of your yard by tiering up or down to match the ground level.

In this guide, we will walk you through the additional steps required to frame a multi-level deck. While the task of building a multi-level deck may seem more intimidating than a standard deck build, this guide simplifies the process and offers step-by-step help to make your next big project smooth sailing.

For a refresher on the deck framing basics, check out our guides on Deck Framing Layout, How to Install Deck Frame Beams and Posts, How to Install Deck Ledger Board and Attach Flashing, and How to Install Deck JoistsIf you are unsure of any of those terms, here's a breakdown of all the parts of a deck.

Step 1: Decide if you are using a freestanding or connected deck framing approach.

The framing of each individual deck level can either be freestanding or connected. (Note: Depending on the rules of your local municipality, you may be required to use one connection type over the other.)

A freestanding deck, much like the name implies, means that the deck stands alone and is not attached to the other levels. In this instance, the different levels could be built as separate decks and finished one at a time. 

Connecting the decks, on the other hand, means the framing from each level attaches to the next level. With the connected approach, the finished product would be completed after the framing is done for all levels.

Step 2: Decide if you want to build each level with a flush beam or a drop beam.

Depending on the design of your multi-level deck, you must determine if you will build each different level using a flush beam or a drop beam. Each of these options has its own benefits, so consider them carefully before making your choice:

Drop Beam:

  • A drop beam can offer more design flexibility if you have enough room to fit the beam between the deck frame and the ground.
  • A drop beam would be attached under the joists.

Flush Beam:

  • A flush beam is used when the deck is very close to the ground.
  • A flush beam will have the top of the joists flush with the top of the beam.

No matter which type of beam you choose, you will likely need to use an angle bracket. These brackets will allow the joist to sit in between and stay flush with the top of the beams while installing the joist hangers. An angle bracket can be attached to the top of the joist and hang slightly over the edge of the joist to leave room for the connecting beam. If an extra angle bracket is not available, a small scrap of wood can also be used.

Step 3: Build out your deck framing for each level

Once you have made your deck framing and beam installation decisions, build out the rest of your framing as you would for any single level deck using the instructions outlined in our guides: 


Tools

Drill

Measuring Tape

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Materials

3" SDWS Simpson Strong Tie Framing Screws

Simpson Strong Tie L70Z Brackets

Simpson Strong Tie SD Connector Screws

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(NOT ALL PRODUCTS ARE AVAILABLE IN EVERY COUNTRY.)

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