Porch Roof Post Spacing

Post spacing should be even.

Porch roof post spacing.

You must have a porch post at each corner of the porch. 2x12 doubled can span 12 normally. Keep in mind that these figures depend on the size and spacing of joists and the overall structural loads. Considerations there are several considerations to be made in determining the proper placement of posts.

Doesn t mater what size the posts are the spacing is governed by beam size and roof load roof slope plays a part in the loading of the beam. Never place concrete next to wood. Solid lumber such as 4 by 4s 6 by 6s and 8 by 8s. Typical post size is a pressure treated 4 4.

Here we look at the most common. How to properly space posts. A 4 by 10 can usually span up to 12 feet between posts. For typical decks where only a few family members or the occasional extra guest and backyard patio furniture are expected the average 5 foot to 8 foot measurements for post spacing can be used but if you expect heavy loads of any kind you will need to contact an engineer as well as your local building inspector to determine the exact spacing.

Patio roof posts columns posts and columns may be made from several types of materials. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Make sure to check with your local building department which has codes that determine the minimum size and spacing for posts. With just rafter load.

Adding a covered porch adds exterior space to a house and providing a. Careful consideration needs to be given to the location size and number of posts and columns your porch needs. If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts. Minimum roof pitch for a covered porch.

Once you decide the distance measure from the house for the first row of boards. Post spacing is going to depend on your design local building codes the size and length of your beams and the size of your posts. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts. According to the old af pa table a 4 foot douglas fir 4x4 post can support 256 square feet of deck.

2x4 doubled can span 4 etc. Using the 2005 nds i calculated that the same post can support 231 square feet so it would seem there s no problem using 4x4s to support say an average sized intermediate stair landing. Rule of thumb a beam can span about one foot for every inch of depth.