Deck Post Calculator
Joist Span = 1
Beam = 1
Deck Width =
Calculates the number of deck posts, and spacing, required for a deck with one side supported by a structure.
-Joist Span: Length that represents the span to be supported by the posts. The selected length should be equal to or less than the actual amount measured.
-Beam: Beam to be supported by the posts that will be used to support the joists.
-Deck Width: Width of the deck.
-#Posts: Number of posts needed.
-Spacing: On-center spacing of the posts.
Calculate the number of posts to support a deck with a beam to be built from two southern pine 2×10s. The center of the beam is 12 feet from the ledger on the house.
-Joist Span: 12ft
-Beam: Southern Pine, 2-2×10
-Deck Width: 20ft
4 posts are required to build this deck, spaced 6ft 8in apart.