Residential PSF Deck Requirements
For a residential deck, the code requires it be designed to support a minimum 40-psf live load. The live load is the external force applied to a deck due to the activities of its use. People, furniture and any other movable, physical objects on the deck are covered under live load. In commercial buildings, the minimum live load required by the International Building Code is determined by the anticipated use of each space, and thus, the anticipated density of people in the space. For assembly uses, such as restaurants, churches and music venues, the minimum live load is 100 psf. Conventional deck construction can support greater live loads by using larger dimension lumber or closer spacing of joists and beams. For residential decks designed for entertaining large groups, it’s not a bad idea to overbuild it from the minimum 40 psf required by building codes.
In regions with heavy snowfall, the snow load may exceed the 40-psf live load. In those instances, allowable spans for larger live loads can substitute for an equivalent snow load. For example, a span table for 60-psf live load could be used for a region with a 60-psf snow load. Some conditions may require additional design consideration, such as areas subject to drifting snow or sliding snow from roofs above. Those loads act on the deck differently and more substantially than live loads.
IRC Code Requirements For Decks
Residential properties have certain code requirements that must be met before building a deck known as the IRC. Learn more about IRC building codes for decks at Decks.com!
Building A Deck Over A Septic Tank
Building a deck on or near a septic tank is not the best idea and can result in a damaged or punctured tank. Learn more about building near a septic tank at Decks.com.
Questions To Ask Your Deck Contractor
The quest to find the right contractor to complete your decking project can feel overwhelming and stressful. Learn more about what questions you should ask before hiring a contractor on decks.com
How to Build a Patio With Stone or Brick Pavers
Planning and installing a DIY brick or stone paver patio is a big project. Learn how to build a paver patio from start to finish here.
12 Backyard Gazebo Ideas
Gazebos are a great way to create a focal point in your backyard. Get ideas and inspiration before you start your gazebo project.
Front Porch Decor Ideas on a Budget
Want to decorate your porch to be welcoming but need to stay within a budget? Explore our budget-friendly ideas for decorating your porch at Decks.com.
More Helpful Resources
Explore Articles by Topic
Footings
Information related to installing frost footings for decks
Framing
Learn structural framing methods
Decking
Learn about wood and composite decking materials
Stairs
An in-depth look at the complex issue of how to build stairs
Railings
How to install guardrails and handrails to meet IRC code
Features
An overview on water drainage, benches, planters and lights
Design
The basics of deck design
Planning
Learn about permits and working with contractors
Porches & Patios
Build a covered deck to enjoy all seasons
Ledger
Proper attachment techniques
Care
Maintain your deck to maintain your investment
Materials
An overview on water drainage, benches, planters and lights
Contractor Problems? How to Communicate with Contractors and Handle Disputes
When working on a large construction project, there are bound to be bumps in the road. Learn how to handle disputes with a contractor with Decks.com.
IBC Requirements For Decks
The International Building Code (IBC) regulates deck additions attached to commercial buildings. Learn how IBC requirements may affect your project at Decks.com.
How to Find & Choose a Deck Contractor
Finding a good contractor to build your deck doesn't have to be hard. Learn how to find a contractor and what to expect when working with one at Decks.com.
9 Conservatory Design Ideas for Indoor/Outdoor Living
Conservatories are a great way to ensure that you (and your plants) can soak up the sun all year round. Get inspired with conservatory design ideas.
Parts of a Porch
Porches, just like decks, have a lot of different & important parts. Learn more about the anatomy of a standard porch with this article from Decks.com.
Different Types of Porch Roof Designs
There are a few roof types and designs when building your porch. Learn the difference between gable, hip, shed style and more porch roofs types at Decks.com!
Explore Articles by Topic
Footings
Information related to installing frost footings for decks
Framing
Learn structural framing methods
Decking
Learn about wood and composite decking materials
Stairs
An in-depth look at the complex issue of how to build stairs
Railings
How to install guardrails and handrails to meet IRC code
Features
An overview on water drainage, benches, planters and lights
Design
The basics of deck design
Planning
Learn about permits and working with contractors
Porches & Patios
Build a covered deck to enjoy all seasons
Ledger
Proper attachment techniques
Care
Maintain your deck to maintain your investment
Materials
An overview on water drainage, benches, planters and lights