how many support posts for a 16x20 deck

Deck Layout and Footing Position Spacing | DIY Deck Plans

Maximum joist span of a 2X8 is 10' 6 at 16 o.c.; Maximum cantilever of a 2X8 is 24 at 16 o.c.; Maximum cantilever of a double 2X8 beam past a support post is 12; Maximum span of a double 2x8 beam is 6'. The standard size of most cardboard footing forms is 8 in diameter. This may change depending on your locale

How to Build a Floating Deck ยป Rogue Engineer

Jun 4, 2016 . If you are connecting the deck to the house you will more than likely need to pour concrete footings that will extend beyond the frost line to prevent the deck from heaving up with a frost. . With our deck being freestanding, the frost may heave it up slightly but once it thaws it will settle back into place

i have a 20' x 20' freestanding patio i want to build. what size .

In all probability, for this size deck, you need to be talking 3 rows of support beams with 3-4 posts each - one beam near house, one near outside edge, . load (which depends on type of decking being put on and the design of the deck itself), and any earthquake and wind loading/hurricane requirements for..

Decks.com. How many footings do I need for a deck?

Learn how to determine the number of footings and support posts you need for your deck when designing your deck frame

DIY Build a Freestanding Cantilevered Deck - Extreme How To

Aug 25, 2010 . As with every major construction project, always consult local codes, and if you have any questions, consult a building inspector. I pulled a building permit . The higher the deck is from the ground, the longer its support posts will need to be and the more likely the deck will be unstable. Thanks to an uphill..

Calculate Deck Load Capacity - Tributary Area - DecksGo

Even some contractors aren't sure where to begin so they just over build which may be entirely unnecessary and cost you more money. Another problem that can arise from over building is a sinking deck. Yes, even if you build a strong deck it can gradually sink into the soil if you don't take into account the size of footings..

Deck building basics - James Dulley

The deck can be considered a floor structure. It has joists to support the flooring material (decking), and posts and beams to hold the unit up off the ground, slightly elevated or higher. Your deck design can be square, rectangular, multilevel or somewhat free-form. Plan and design the deck before buying any tools and..

HOMETIME HOW TO, Decks - Building a Deck: Overview

That raises questions about how the siding will be cut away at the point of attachment and whether there's solid house framing accessible at that point to properly support the deck. Pouring deck footing How many footings and posts will be needed to support the deck and where will they go? Footings and posts support the..

CO Decks Guide - Colorado.gov

Permits are required by Ordinance. Work without a permit may be subject to re- moval or other costly remedies. What do I need in order to apply for a building permit? The following must be submitted: DID YOU. KNOW? Site Plan. Page 2. House Attachment. Page 3. . Page 5. Cross-Section Deck Plan. Footings

Estimate and Build a Deck in 7 easy steps | Dengarden

Apr 5, 2016 . We need 10 posts for our deck, but the two posts at the bottom of the steps will be on the ground (deck elevation = 0) and only need to be 5 feet long. We will need 8 . Because our deck will measure 16 feet wide by 12 feet out from the house, we do not need any center support beams. The 2x10x12' floor..