## What is the maximum span for a 4×6 beam?

Obviously, the larger the **beam**, the greater the distance it can **span** between posts. A Redwood **4×6 beam** should **span** no more than 6′ between supporting posts.

## How much weight can a 4×6 post support vertically?

The **load** capacity of a 3-foot #2 grade 4×4 is 17,426 pounds, and a similar 6×6 is 20,834 pounds or 16% better. However, an 8-foot 4×4 **supports** 6468-pounds and 2339-pounds at 14-feet, while a 6×6 is 18032 and 10550-pounds respectively – or 64% and 78% more **load** capacity.

## How strong is a 4×6?

With all things being equal, meaning knot locations and sizes, a **4×6** is **stronger** with the 6″ side being vertical due to what is called “moment of inertia”. In similar terms this is a measure of objects resistance to rotate.

## How much weight will a 6×6 beam support?

If you assume a conservative 1400psi allowable bending stress, a single 6×6 with 12′ span can support about **2000 lbs**. So your double 6×6 can support at least **4000 lbs** (possibly more if you do a good job bonding the two members together so that there’s no slip between the faces).

## How big of a beam do I need to span 20 feet?

For a **20** foot **span**, wood **beam needs** to be minimum 18 inches deep. We ended up lifting that heavy ass **beam** by by hand. This was about a **twenty** foot **span**, set the **beam** on 4″ round steel columns on 12×12 by 1/2 inch plate on block. So, if your **span** is 30 **feet** (or 360 inches) you **would** divide that by **20** to come to 18 **feet**.

## How far can a beam span without support?

People also ask, how far can a 2×8 span without support? In general terms, joists spaced 16 **inches** on center can span 1.5 times in **feet** their depth in **inches**. A 2×8 up to 12 **feet**; 2×10 to 15 **feet** and 2×12 to 18 **feet**.

## How far can a 2×6 span without support?

A 2×6 can support up to 50 pounds per square foot of weight without sagging with a maximum span of about 12 **feet** when spanning a distance horizontally, with the 2×6 standing in a vertical position.

## Should you use 4×4 or 6×6 deck posts?

**4×4 post** will be fine. I have built many **decks** for new homes with them. **6×6** is more sturdy of course and will not twist as easy, but for structure purposes, **4×4** will be fine. I would just not go more then 10′ apart with them.

## How much weight can a 6 by 6 post hold?

For a **6**‘ long **post** of fir, 10,000lbs is right. Says this. When we build shoring for building collapses/urban search & rescue, our go-to guide is from the US Army Corps of Engineers. As this screencap from it will tell you, a **6×6 post can** support 20,000 even when 12′ high—if cross-braced and secured properly.

## What is the span of a 4X6?

Furthermore, how much weight will a **4×6** hold? 2 Answers. Assuming it’s “Lodgepole Pine” (Idaho Pine and Ponderosa Pine is slightly less) and it’s grade is a No.

How far can you **span** a **4×6** header?

Joist Spans |
||
---|---|---|

Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir, Redwood, Cedars, Ponderosa Pine, Red Pine | 4X6 |
4′-8″ |

4X8 | 6′-3″ | |

4X10 | 7′-5″ | |

4X12 | 8′-7″ |

## Are 3 2×6’s as strong as a 6×6 post?

One **6×6** will be 22% **stronger than three 2×6’s**. This assumes, of course, that the long side of the thinner boards is vertical, and that we’re talking standard dimensional lumber where a 2×8 is really 1.5×7. 5, etc. **Beam** bending strength is proportional to the width of the **beam**, but to the cube of the height.

## Are two 2×6 stronger than a 2×8?

In bending, a joist composed of **two 2×6’s** (true dimension 1.5 inches x 5.5 inches) are slightly **stronger than** a single **2×8** true dimensions 1.5 inches by 7.25 inches.

## Can I use a 6×6 as a beam?

2 Answers. No. 6-by lumber hasn’t been **used** for **beams** since the 60s or so (and it doesn’t fit in your wall anyway). An engineer would specify something between a doubled 2×10 and a doubled 1-3/4″ LVL (engineered lumber) **beam**, up to 12″ nominal height, depending on the roof system.

## How much does a 16 foot pressure treated 6×6 weigh?

Weight of Pressure-Treated Lumber

Weight of Pressure–Treated Lumber (Made with Southern Yellow Pine, Longleaf Variety) |
||
---|---|---|

6 x 14 | 5.5 x 13.25 | 20.95 |

6 x 16 |
5.5 x 15 | 23.72 |

8 x 8 | 7.25 x 7.25 | 15.12 |

8 x 10 | 7.25 x 9.25 | 19.28 |

## How long will pressure treated 6×6 last?

The **treated** post that are rated for ground contact are guaranteed for 40 years.