# What is a 6×6 wood?

## What is a 6×6 wood?

What are the dimensions of a standard 4×4 or 6×6 wood post? The lumber industry defines standard wood post sizes as 4×4 or 6×6. The outside dimensions of the standard 4×4 measure 3-1/2″ x 3-1/2″, and the outside dimensions of the standard 6×6 measure 5-1/2″ x 5-1/2″.

## How heavy are 6×6 timbers?

Table of Pressure-Treated Lumber Weights

Weight of Pressure-Treated Lumber
4 x 16 3.5 inch x 15.25 inch 15.2 lbs
6 x 6 5.5 x 5.5 8.61
6 x 8 5.5 x 7.25 11.35
6 x 10 5.5 x 9.25 14.48

What are the different types of treated lumber?

There are three main families of treated lumber used in construction: Borate, Alkaline Copper Quat (ACQ) and other rot-resistant treatments, and non-combustible (Non-Com).

What are landscape timbers treated with?

Most of the landscaping timbers currently sold for use in the home landscape are treated with less-toxic solutions that contain copper and boron, such as ACQ, which stands for alkaline copper quaternary.

### How strong is a 6×6 post?

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 much weight can a pressure treated 6×6 hold?

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 much weight can a 6×6 post hold?

What is the lightest wood?

Balsa. The balsa tree produces a creamy white wood that when dried has a density of just 7.5 pounds per cubic foot, one of the lightest species of wood available. This wood had superior strength compared to other light-density woods and was once used to build airplanes.

## What are the different grades of lumber?

Table 5: Lumber Grades for Hardwoods

Grade Name Abbreviation Minimum Board Size
First and Seconds FAS 6 in. x 8 ft.
FAS One Face F1F 6 in. x 8 ft.
Select SEL 4 in. x 6 ft.
#1 Common No. 1 C 3 in. x 4 ft.

## What are the different grades of pressure treated lumber?

Pressure treated wood is sold with the lumber grades Premium, Select, Number 1, Number 2, and Number 3. The higher the grade, the fewer the defects—that is splits or knots. In general, you will want to choose Number 2 grade boards, or higher, for decks.

How long do treated landscape timbers last?

The fun fact about pressure treated wood is that it is warrantied – but putting it in continuous contact with the ground voids the warranty. Even so, you can reasonably expect to get anywhere from 10-20 years out of a timber wall.

What is the best wood to use for landscaping?

Good Lumber to Use for Landscaping

• Redwood. Redwood has a natural, rustic look and is naturally rot-resistant.
• Cedar. Naturally rot-resistant, cedar is used for its strength, is lightweight and has good weathering properties.
• Cypress.
• Pressure-Treated.
• Composite.