Users' questions

Can you splice deck beams?

Can you splice deck beams?

It is always best to use a continuous beam without seams for higher strength. However, if your span is greater than 20′ (like the image below) you will likely need to splice some boards to form a beam. In order to do this you should overlap the individual parts of the beam so they are staggered if possible.

How do you combine two beams on a post?

Joining beams over posts can be done by either cutting a notch out of the post and splicing the beams together over the notch or by butting the ends of each beam together on top of the post and joining them using galvanized metal post caps.

Can I use a 4×6 as a beam for a deck?

using 4×6 or 6×6 solid SYP beams is that they tend to warp and/or bow like crazy. We use PT douglas fir beams and joists. If left in the sun, unattached to anything, they will also go crazy. But generally, once they are attached, in place, they are fine.

How far can a triple 2×10 beam span?

15 feet 3 inches
As the table shows, no 2×8’s meet the span and spacing requirements, but a 2×10 with an E of 1,300,000 psi and Fb of 1093 psi can span 15 feet 3 inches – more than enough.

Is a 4×6 stronger than 2 2×6?

A 4×6 joist is theoretically stronger than a doubled 2×6 joist because it’s 1/2″ thicker, but the actual strength depends upon the knots and other inherent weaknesses of any particular piece of lumber (#2 lumber can have some nasty spike knots or large not-so-tight round knots or wane).

How far can you span a double 2×8 beam?

A rule of thumb is 1.5 times a joist’s depth but in feet when spaced at 16” centers. In general, a 2×8 will span 1.5 x 8, so 12-feet.

How far can a 4×6 beam span without support?

A Redwood 4×6 beam should span no more than 6′ between supporting posts.

How far can a 4X10 beam span without support?

Dimensional Lumber Deck Beam Span Chart

Joist Spans
Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir, Redwood, Cedars, Ponderosa Pine, Red Pine 4X8 7′-0″
4X10 8′-4″
4X12 9′-8″
3-2X6 6′-5″

How to splice a deck beam over a support post?

Drill 2 thru holes on the edges of each beam section through the beam and notched 6×6 post. Align your holes 2″ from the top and bottom and edge of the beam. Take out your socket ratchet. Use a socket ratchet to tighten the 1/2″ x 6″ thrubolts from one side of each beam section through the beam and notched post.

How big should a deck beam be between posts?

Refer to the Deck Beam Span Table below to assist in determining the maximum span of a given beam between posts. 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. W. cedar. Redwood

Do you know the spacing of your beams?

During your planning stage, don’t forget to consider the spacing for your beams. You should also know the size of the post you are considering to use. See the Deck Post Size Table to make that determination because it will affect the size of beam you choose.

Do you need to block beams on a deck?

Solid blocking over beams should be mandatory for decks. Most locations have added it to their deck framing code. Where posts and beam or girder construction is used to support floor framing, positive connections shall be provided to ensure against uplift and lateral displacement.