How to Build a Deck Frame

How to Build a Deck Frame

When your deck posts are all installed, it’s time to build the deck frame. The frame in this tutorial essentially represents all the primary support beams that your deck will require – the perimeter, of course, and also a few beams running through the center of the deck perimeter to support the middle sections of the deck floor. This process is actually pretty simple and straightforward, so there’s no need to procrastinate any longer. Let’s get to it!

View in gallery

View in gallery

You’ll want to begin installing your deck frame at the sturdiest, most solid point on your deck. In the case that you’re mounting to your house, that point is where the deck begins to leave the house. Measure from one corner to the farthest corner of your outer post. (Optional: Depending on the lengths of lumber that you are dealing with, it may make more sense for you to add 3” to this measurement and have your outer frame extend 3” past the corner on this side. This connection will be explained later.)

View in gallery

Cut two pieces of 2×6 pretreated lumber to this length.

View in gallery

Clamp the two pieces of lumber together in two directions: (1) to keep the boards pressed together, and (2) to keep the sides of the boards flush with each other.

View in gallery

Use 2-1/2” exterior wood screws to attach the boards. A couple of screws every 2’ or so is plenty; you don’t need to go wild here.

View in gallery

In the instance that your outer deck frame abuts with a wall-mounted deck frame, a hanging bracket won’t work because one side of it has nothing to attach to but air.

View in gallery

Use a heavy duty kreg jig to drill four pocket holes into your doubled-up 2×6, two on each side at one end.

View in gallery

Have your 2-1/2” heavy duty pocket screws handy.

View in gallery

Prop the doubled-up 2x6s up so the tops of the lumber are flush with the connection lumber (in this case, the wall-mounted lumber). Use 2-1/2” heavy duty pocket screws to attach the boards.

View in gallery

Install pocket screws into all four pocket holes, two per side. The outside edges of your corner should now be flush.

View in gallery

Place a level on your doubled-up deck frame boards to see where it will attach to the corner post.

View in gallery

In the instance that you are attaching this doubled-up 2×6 to a bracketed 2×6 cedar pergola post, you’ll notice that the heads of your lag bolts and washers extend outward, which means that your deck frame won’t be able to lie flush onto your posts that you worked so hard to make even and square and level.

View in gallery

Don’t fear. Simply use a hammer and chisel to remove the portion of your deck frame that will go over top of the bolt heads.

View in gallery

Measure how far out the bolt heads and washers extend, and measure the size of the bracket rectangle itself, then chisel out that much.

View in gallery

Set a level on the doubled-up boards, and make sure it’s level as you align the floating end with the post.

View in gallery

Keeping the level and your doubled-up deck frame boards in place, predrill holes for your lag bolts (try to reach the drill bit into the corner post if you can). Drill out about 1/2” deep with a removal bit that is slightly bigger than your washers.

View in gallery

This will allow the bolt heads to go into the lumber, rather than stick out, which will help immensely when you go to install your exterior deck boards.

View in gallery

Use a ratchet drill bit to install your lag bolts WITH WASHERS. Don’t ever forget the washers on these. (These are 3/8” diameter 4” long lag bolts, which is long enough due to the countersinking.)

View in gallery

As you can see, the face of your deck frame is flush, with the lag bolts countersunk into the pretreated lumber.

View in gallery

Install a full lag bolt and washer to hold the board in place while you do the other lag bolt. Repeat the process for a second lag bolt. You can install a third and/or fourth if you’d like, but it’s not necessary.

View in gallery

Now that the two corners are installed, use the same lag bolt process for attaching the doubled-up deck frame to any center 4×4 posts.

View in gallery

Now that the first doubled-up deck frame perimeter piece is installed, you’ll use its end to begin your second section. This next section will be installed much like the first, with a few things to keep in mind.

View in gallery

When you measure this second stretch of outer deck framing, you’ll want to measure to a mountable point. In this case, it was halfway through our second pergola post. You may find yours to hit a 4×4 post; measure to the halfway point of this so that both ends can be attached.

View in gallery

Also, and this is very important, you’ll need to measure from the OUTER corner of your frame. In this case, now that we’ve added a doubled-up lumber frame, you’ll measure to the outside corner of these boards instead of the corner of the post. The corner of the post means nothing to you anymore, with relation to frame board length. (However, if you chose at the beginning to add 3” to your original board length and now have a 3” overhang of doubled-up deck framing, you’ll measure to the inside of these boards.)

View in gallery

Fortunately, the bracket of your pergola post only has to be dealt with on one side, so at least one of your deck frame installations won’t require chiseling. Hooray!

View in gallery

Begin the next section of deck frame install at the end point of the last section, which should be at the center of a deck frame post. Two lag bolts should provide plenty of support at each post, if you’ve done the research and spaced the boards out according to recommended spatial-weight ratios.

View in gallery

When you come to a point on your deck that doesn’t allow you to mount a bracket, neither does it allow you to install pocket screws onto both sides of your doubled-up framing boards, you might have to get creative.

View in gallery

In this instance, pocket holes were drilled on one side of the doubled-up boards as well as on the top.

View in gallery

A 6” corner bracket was then installed with #8 nails to add additional support.

View in gallery

While it’s not how a deck would be framed in the ideal world, you sometimes have to get creative when dealing with obstacles and retrofitting something in place. This setup will provide plenty of support in this little corner.

View in gallery

Note, again, how you must carefully consider which side of a corner can accommodate the additional 3” length of your boards. You can’t simply measure to the corner of the post on both sides, because that would leave you with a 3” blank square on the very outer corner of your deck.

View in gallery

In some instances, the lag screws must be installed from the post side out to the doubled-up deck frame. That happens when there’s a permanent obstacle on the outer edge that won’t allow access to that side of the deck frame. If this is the case, countersink about 1” into your 4×4 post so that a 4” lag screw will hit into the second (outer) 2×6 pretreated lumber of your deck frame.

View in gallery

Some sections of your deck frame might incorporate a variety of these deck framing methods, and that’s perfectly fine as long as each is installed with sufficient support in its own right.

View in gallery

At this point, following this routine procedure, you should have completed the outer perimeter of your deck frame.

View in gallery

It can’t be stressed enough, as you work on this, to check and double-check for level and flush at every point. Being precise and accurate at this stage of the game will not only make it easier for you as you begin working on the deck floor, but it will also make the end result turn out much better.

View in gallery

Depending on the size of your deck, though, you may need to add in a bit more framing for support. This deck will be 14’ by about 25’ at the longest point, so we will need two additional framing beams running across the deck. Note: Install these support beams in the same direction as you want your deck floor boards to run.

View in gallery

With your tape aligned on the sides of the posts that you will be using for these support boards, measure from the inside edges of your deck frame. Mark this length on two 2×6 pretreated lumber boards, and cut them one at a time. Stack the boards and give them a two-directional clamping all the way down the boards.

View in gallery

Once again, you’ll want to screw these boards together.

View in gallery

These beams will be in the center of your deck and, thus, will carry the bulk of your deck support responsibilities. 5” lag screws will be used for these.

View in gallery

Holding the doubled-up boards in place, flush against the two posts that they will be using for support, place a double 2×6 bracket against the wall-mounted framing board.

View in gallery

Mark the position of the bracket, including the inner sides and the top. Be sure that a helper is holding the other end of the beam flush and in line on the other side of your deck frame, so that your markings are accurate. Note that the bracket will NOT be installed flush with the top of the 2×6 frame; instead, it will be installed a little bit lower so that the beam it holds is flush.

View in gallery

Use #8 nails again to install the bracket, using your pencil marks as guidelines.

View in gallery

Place the beam into the bracket.

View in gallery

Pound in the additional nails into the beam lumber; there should be two diagonal nails into each of the 2x6s on your doubled-up beam.

View in gallery

Clamp the other end of your beam in place, keeping all edges flush and paying particular attention to the tops of your framing boards. These need to be evenly flat.

View in gallery

Install the other end of your post using the same steps for deck frame installation that you’ve used previously: predrill, drill countersinking hole, ratchet in lag screw and washer. Repeat.

View in gallery

Next, move onto mounting your beam to the middle post, since both ends are now firmly installed.

View in gallery

You’ll probably want to clamp the beam to the post while you’re predrilling and ratcheting in the lag screws. Even if it’s flush to begin with, the beam has a tendency to push away from the post as you’re screwing it in.

View in gallery

Repeat for the other center beams.

View in gallery

Congratulations! You’ve completed installing the main support beams for your deck.

View in gallery

Next will come joists, installed perpendicular to the beams.

View in gallery

But, for a minute, sit back and enjoy what you’ve created so far. It’s becoming a reality, and you’re getting things accomplished. Well done.

Powered by WPeMatico

eBay