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Blog
Home > Blog > How to add a frame to your deck
26Nov
  • By EVODEK
  • Fri, Nov 26, 2021
  • 410 Views

How to add a frame to your deck

A solid amount of deck frame is the heart of building a deck. After completing this step, you will have a frame to add decking materials. Safety features such as railings and stairs, and even other decorative items such as planter boxes and benches.

Table of Contents

  • About the deck
  • Removing house siding
  • Install the sill plate
  • Install deck support post bases
  • Installation of deck support posts
  • Installing the deck support beams
  • Attaching the Edge Joists
  • Hanging Deck Joists

About the deck

In most areas, decks that are less than 30 inches in height can be installed without railings. Instead, install railings whenever possible for safety reasons. Decks that are higher than 30 in. Local permitting authorities need to be consulted to obtain a building permit. The frame of the deck runs along the side of the house and is attached to the house on the side of the frame.

Removing house siding

The sill plate is a two-by-ten horizontal wood member. That attaches directly to the side of the house, using the strength of the house as one of the four sides of the deck framing. House siding cannot support a ledge because it is not structural lumber and in many cases, it is not vertical.

Cut out a section of house siding that is comparable in size to the intended ledge board. In the vertical direction, the ledger board should be located directly above the top beam of the house. This is the joist in the house where the subfloor and floor coverings are located. Place the top of the ledge board 1″ below the interior floor to prevent rainwater from seeping into the house.

Mark the section to be cut with a pencil and use a bubble level to make sure the ledge section is level. Cut the siding with a circular saw set to the thickness of the siding. Finish the cut by gently tapping the cut line with a chisel and hammer.

Install the sill plate

Cut the flashing to the same length as the siding. Install the flashing on top of the siding cut out so that one side of the flashing is under the siding.

Install the sill plate in place to hold it in place. Drill 1/4-inch pilot holes at 2-foot intervals. Drill each pilot hole to 1/2 inch with a drill bit. Use a ratchet to drive 3/8 in. x 4 in. lag screws and washers into each pilot hole and countersink below the face of the ledge plate.

Install deck support post bases

All decks require vertical support posts to secure the deck to the ground. The support posts must be placed on a masonry base so that the deck is firmly rooted in the ground and not subject to ground movement or erosion.

Select a straight distance from the sill plate to place the support posts. Cut concrete from pipes to length; they must extend down to below the frost line in your area. Dig the hole with a hole digger, leaving a few inches of height at the top so the pipe is above ground level.

Installation of deck support posts

Secure the metal post base to the top of the foundation by embedding J-bolts into the concrete. Screw the base into the hardened concrete while the concrete is still soft. Or after the concrete has hardened using 1/2-inch by 3-inch steel sleeve anchors.

Install vertical support posts with 6-by-6 lumber, cutting each post to length. Determine the length by shooting from the bottom of the fireplace slab with a laser level. and subtract 9 1/4 inches to account for the height of the support beams you will install in the next step.

Installing the deck support beams

Install the steel post caps to the top of the support posts using the hardware provided. Locate the post cap so that when the support beam is placed in the post cap, it will be parallel to the ledge board. Fold the two sheets together to form the support beam. Place the support beam on the saddle of the post cap and secure it with galvanized steel bolts, washers, and nuts.

Attaching the Edge Joists

The edge joists are the two-by-ten joists that form the perimeter of the deck frame. Cut the two edge joists (called outer edge joists) so that they extend 1 foot beyond the support beams. Attach the outer edge joists to the ledge boards with deck joist hangers. Finally, secure the third edge joist (called the roof edge joist) to the two outer edge joists with truss hangers.

Hanging Deck Joists

The spacing of the deck joists depends on factors specific to your project. For example, the predicted weight load and the type of deck flooring you intend to use. Use your pencil to mark each space on the joists. Mark the inside of the head side joists accordingly. Install the joist hangers with 1 1/2″ galvanized steel structural attachment screws. Cut the deck joists to length, slide them into the joist hangers, and secure the joists to the hangers with the same 1 1/2″ screws.

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