When building a deck, proper support structure and stability are crucial. The distance between the support posts of the deck is a key factor in ensuring the stability of the deck's structure. So, how do you determine the correct distance between support posts?

The maximum distance between support posts should be determined based on factors such as local building codes, the size and shape of the deck, the expected load, and the type and size of the decking material.

In general, the distance between support posts on a deck should not exceed 6 feet. For example, if you're using 5/4 inch thick decking boards, the maximum distance between support posts should be 6 feet. This means that on a 12-foot deck, you would need to install at least two support posts.

If you're using 2x6 inch decking boards, the maximum distance between support posts should be reduced to 4 feet. On a 12-foot deck, you would need to install at least three support posts.

Here are a few examples that will help you better understand the spacing between support posts:

If you're building a 16-foot by 20-foot deck and using 5/4 inch thick decking boards, you would need to install at least seven support posts. There should be one at each edge and five in the center, with a maximum distance of 6 feet between them.

If you're building a 12-foot by 12-foot deck and using 2x6 inch thick decking boards, you would need to install at least three support posts. There should be one at each edge and one in the center, with a maximum distance of 4 feet between them.

It's important to note that the quality and strength of the support posts are critical to the stability of the deck's structure. In order to support the weight of the deck and the expected load, the support posts must be strong enough and meet the local building code requirements.

Additionally, if you plan on using heavy furniture or equipment such as a barbecue on the deck, it's recommended to increase the number of support posts to provide stronger support. Depending on the size and location of the load, you may need to add an additional support post in the center of the deck.

In summary, the correct number and spacing of support posts are crucial for ensuring the stability and safety of your deck. Be sure to follow local building codes and determine the best number and spacing of support posts based on factors such as decking material/size, expected load, and environmental conditions. Because building a deck involves many factors, such as deck size, material, design, expected load, and local building codes, the final number and spacing of support posts should be calculated and determined based on the specific situation. If you have any questions, please consult with us for more detailed information.