A deck greatly expands your outdoor living space while adding a beautiful focal point to your backyard.

Wedge a shim above the post of one beam, if necessary.

Drill pilot holes and drive screws or nails to fasten the beams to each other.

metal wood deck table and chairs

Credit: Laurie Black

Check for square, then anchor the rim joists to the beam with screws.

To mark the angled cut line, measure out from the corner an equal distance in both directions.

Align a straight 1x4 with both measurements, and mark the header and the rim joist.

level the beams

Credit: Dave Toht

Transfer the marks to the faces of the boards with a square.

Hold the angle-cut piece in place and drill pilot holes.

Attach it with nails or screws.

mark the angled cut

Credit: Dave Toht

Cut and Install Joists

Cut and roll out the joistswith the crowns up.

Attach joist hangers at the ledger, or drive screws or nails through the header into the joists.

To measure for cutting a joist at the angled section, hold it in place and mark it.

cut header and rim joist

Credit: Dave Toht

Cut a joist to length and hold it in place.

Steps often slope away from the house, so there might be a gap under the joist.

Mark where the joist meets the top of the ledger.

cut to fill corner

Credit: Dave Toht

Transfer that measurement to the joist where it crosses the edge of the step.

Lay out your cut line between these two points.

Because the width of the joist has been reduced, it must be reinforced.

cut and install joists

Credit: Dave Toht

Attach the support to the joist with several screws.

Attach Angled Joist

Use a special skewed joist hanger to attach an angled joist to the header.

If a vent falls at the top of a ledger, cut a notch for it.

notch joists around steps

Credit: Dave Toht

Install ledger pieces on either side, taking care that the pieces are at exactly the same height.

Cut a joist to run from the header to the blocking piece.

attach angled joist

Credit: Dave Toht

work around obstructions

Credit: Dave Toht