Materials list

ITEM

QTY.

4" x 8" x 12" solid concrete block

6 (min.)

Class 5 crushed gravel

6 bags

4x6 x 10' pressure-treated timbers

2

2x6 x 12' (12" o.c. joist spacing)

19

1-1/2" corner angles

22

7" reinforcing angles (or 2x4 x 11" blocks)

25

5/4x6 x 12' decking (Trex or other)

25

1x8 x 12' matching skirt board

5

Joist hanger nails

2 lbs.

1-5/8" deck screws

5 lbs.

3" deck screws

2 lbs.

2" stainless steel trim head screws

2 lbs.

Hidden deck fasteners (search online)

2

1x4 x 10' temporary stretchers (for layout)

2

Cutting list

KEY

QTY.

SIZE & DESCRIPTION

A

2

3-1/2" x 5-1/2" x 120" beams

B

13

1-1/2" x 5-1/2" x 135" joists

C

2

1-1/2" x 5-1/2" x 138" rim joists

D

7

1-1/2" x 5-1/2" x 48" stair stringers

E

24

1" x 5-1/2" x 138" deck boards cut in place)

F

2

1" x 5-1/2" x 55-1/2" stair treads

G

2

3/4" x 7-1/2" x 140" skirt board

H

2

3/4" x 7-1/2" x 138-1/2" skirt board

J

1

3/4" x 7-1/2" x 48" skirt board

K

1

3/4" x 7-1/2" x 24" skirt board

L

1

3/4" x 7-1/2" x 57-1/2" riser

M

6

1-1/2" x 5-1/2" x 7-1/2" blocking

P

10

1-1/2" x 5-1/2" x 10-1/2" blocking

Q

25

1-1/2" x 3-1/2" x 11" joist supports (can be used instead of metal reinforcing angles)

R

40

1/4" x 5-1/2" spacers

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1 Lay a quick foundation with minimal digging by setting concrete blocks on gravel. Level from high to low spots with a string level.

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2 Take diagonal measurements and tap one beam forward or back to square the beams. Temporary stretchers hold the beams parallel.

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3 Screw on angle brackets at each joist location instead of toenailing, which can split and weaken the joists and knock the beam out of square.

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4 Install the middle and end joists, then screw on the rim joists, using clamps (or a helper) to hold them in place.

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5 For strong connections at the corners, set corner blocking between the last two joists, then nail the rim joist from both directions.

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6 Frame the steps next. You can avoid additional footings by hanging stringers from the deck joists with metal angles or 2x4s.

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7 Attach the deck boards. Decks look best when you use hidden fasteners, but they make installation slower. Trim the deck boards flush with the rim joist when you’re done.

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8 Wrap the deck with skirt boards that match the decking, driving trim head screws just below the surface at the spacer locations (see Figure A).

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9 Screw skirt boards to the sides of the steps for a finished look, then measure, cut and attach a riser board to the face of the steps.