JoistLedgerSpans, joists and footings straight from the code tables.

JoistLedger

Spans, joists and footings straight from the code tables.

SectionsLatest
Joist & Beam SpansHow far a joist or beam actually spans, by species, size and spacing — from IRC Table R507.158
Framing QuantitiesJoists, blocking, hangers and fasteners for a deck of a given size.6
Decking BoardsBoard counts by width and pattern, with the waste a diagonal layout really costs.2804
Footings & PostsHow many footings, how big, and what each one is actually carrying.4
Stairs & RailingsStringer layout, rise and run, and the guard height code requires.3
  1. Ledger Attachment — The Connection That Fails When Decks CollapseFraming Quantities · 3 min read

    The deck does not break. The connection to the house lets go, all at once, usually with people standing on it.

  2. Post to Beam — Wood on Wood, Never Fasteners AloneFootings & Posts · 3 min read

    Bolts through the side of a post look solid and carry the load in shear on the fastener. The code wants the weight sitting on wood.

  3. Deck Cost by State — Priced From BLS Carpenter PayDecking Boards · 6 min read

    Deck quotes vary more within a town than between states, and this table shows why: carpenter pay ranges 45% across the country but only lands on 55% of the bill.

  4. Deck Cost by Size — 8×10 to 20×24, and the Two Things That Beat Square FootageFraming Quantities · 3 min read

    Deck cost per square foot falls as the deck grows, then height undoes it. A tall 12×16 can cost more than a ground-level 16×20.

  5. Deck Stair Railing Cost by Material, and the Code That Sets the DesignStairs & Railings · 3 min read

    Railing is priced per linear foot and specified by code. Most of the cost difference between quotes is which of the two rules the builder read.

  6. Deck Board Gap: Why Wet Lumber and Composite Need Opposite NumbersDecking Boards · 3 min read

    There is no single correct gap. There is a correct gap for a board that is going to shrink and a different one for a board that is going to grow.

  7. Deck Stair Rise and Run: The Limits, and the 3/8 Inch That Fails InspectionsStairs & Railings · 3 min read

    Stairs fail inspection more often for being uneven than for being too steep, and the tolerance is three eighths of an inch across the whole flight.

  8. Cost to Replace Deck Boards Only: When Resurfacing Beats RebuildingDecking Boards · 3 min read

    Resurfacing saves roughly half the cost of a rebuild, provided the frame underneath has more life left than the boards you are about to screw to it.

  9. Deck Beam Span Table: Why the Span Depends on the Joists, Not the DeckJoist & Beam Spans · 4 min read

    A beam span table has two inputs, and the one people forget is the joist span the beam is carrying. Read it with one input and the answer is wrong by feet.

  10. Deck Footing Size by Soil Bearing: Tributary Area, Load, and the Diameter It GivesFootings & Posts · 4 min read

    Footing size is one division: the load a post carries, divided by what the soil under it can hold. Both numbers are published, and neither is the one people guess.

  11. Deck Framing Lumber Cost: A Line-by-Line Take-Off for a 12 × 16 DeckFraming Quantities · 3 min read

    The frame is a third of a deck's cost and the part nobody itemises. Here it is, line by line, for a deck you can scale from.

  12. Deck Permit Cost and the Thresholds That Trigger OneFraming Quantities · 3 min read

    The permit is rarely the expensive part. The unpermitted deck discovered during a sale is, and that bill arrives at the worst possible moment.

  13. Deck Post Size by Height: When 4×4 Stops Being AllowedJoist & Beam Spans · 3 min read

    The 8 ft line is where 4×4 stops. Above it the question is not only size but bracing, and the connection at each end matters more than the post between them.

Built-up beam span by ply, size and joist span

112 calculations · Joist & Beam Spans · browse all

Decking boards

845 calculations · Decking Boards · browse all

Deck cost by city

1,494 calculations · Decking Boards · browse all