What Size Beam Do I Need to Span 20 Feet

When it comes to choosing the right size beam to span 20 feet, there are a few things you need to take into account. The type of material the beam is made from, the weight it will be carrying and the span of the beam all play a role in determining the right size. For example, if you are using a wooden beam for a small shed, it will need to be much smaller than if you were using it for a two-story home.

When you are planning to put a new beam in your home, one of the first questions you need to answer is how large the beam should be. This can be determined by calculating the span of the beam. The span is simply the length of the area that the beam needs to cover.

In most cases, you will want your beam to span at least 20 feet. There are a few different ways that you can calculate the size of beam you need to span 20 feet. The most common way is to use a span table.

These tables can be found in most construction manuals and they list out the recommended spans for various types of beams based on their width and thickness. Another way to determine the size of beam you need is by using what is called a deflection formula. This formula takes into account things like the weight of the Beam and how much it will be used.

This information can then be used to help determine how thick and wide your Beam needs to be so that it does not sag or bend under its own weight or from use. Once you have determined how large your Beam should be, it is important to select one that is made from high-quality materials. This will ensure that your Beam lasts for many years without any problems.

What Size Beam Do I Need to Span 20 Feet

Credit: civilsir.com

How Big of a Beam Do I Need to Span 21 Feet?

When it comes to beams, size definitely matters. The general rule of thumb is that the beam should be 1/3 the length of the span. So, for a 21-foot span, you would need a beam that is at least 7 feet long.

However, there are other factors to consider when choosing a beam size. The type of material you are using and the loads the beam will be carrying also play a role in determining the best size for your needs.

What Size Glulam Do I Need for a 20 Foot Span?

When it comes to sizing GLULAM beams for a 20 foot span, there are a few things you will need to take into account. The first is the beam’s width. The wider the beam, the more support it can provide.

However, this also means that the beam will be heavier and more expensive. You will also need to consider the type of load that will be placed on the beam. If it is a live load, such as people or furniture, you will need to use a stronger beam.

Finally, you should check with your local building codes to see what size GLULAM beam is required for your specific project.

How Much Does a 20 Foot Glulam Beam Cost?

A 20 foot GLULAM beam typically costs between $100 and $200, depending on the exact specifications and where it is purchased.

How Far Can a 4X12 Beam Span Without Support?

A 4×12 beam can span up to 12 feet without support. It is important to note that the beam must be properly supported in order for it to span this distance safely. The beam should also be made of material that is able to support the weight of whatever will be placed on it.

What size lvl beam do I need to span 20feet with roof load

How to Build a Beam to Span 20 Feet

Building a beam to span 20 feet is not as difficult as it may seem. With the right materials and some careful planning, you can have a sturdy beam in place in no time. Here are the steps you need to take:

1. Choose your materials. For a beam that will span 20 feet, you’ll need at least four 6×6 beams of pressure-treated lumber. If you want to add some extra support, you can use two 8×8 beams instead.

2. Place your beams on top of each other, flush at the ends. Use either bolts or lag screws to secure the beams together at each end. Make sure that the heads of the fasteners are countersunk so they don’t protrude from the surface of the beam.

3. Once your beams are secured together, it’s time to start putting them into place. If you’re building on an existing structure, like a house or garage, you’ll need to attach brackets to the existing framing first. Then simply lift the beam into place and secure it with nails or screws driven through the bracket into the ends of the beam.

4 . If you’re not attaching your beam to an existing structure, then you’ll need to build posts or columns to support it at each end . The height of your posts will depend on how deep you want your beam to sit; for example , if you want your beam 10 inches off of the ground , then your posts should be about 12 feet tall .

To build your posts , start by digging holes that are 2 feet deep and 2 feet wide . Then fill these holes with concrete and set 4×4 treated lumber posts in them . Allow the concrete to cure for 24 hours before proceeding .

Securely nail or bolt your Beam across both supports so it is level and plumb (check with a level). Add diagonal braces if desired for extra strength At this point finish nailing or bolting all connections securely Fill any gaps between wood members with caulking Paint or seal all exposed surfaces as desired Your new Beam is now complete!


If you’re planning to build a structure that’s 20 feet wide, you’ll need to use a beam that’s at least 20 feet long. The type of beam you’ll need will depend on the amount of weight it will need to support. For example, if you’re building a garage, you’ll need a stronger beam than if you’re building a shed.

Similar Posts