HammerCalc helps framers with beam calculator and joist calculator style dimensional layout math — spans, spacing takeoffs, and related feet-inch work — next to rafters, stairs and square footage on Apple devices.
Queries like roofing joist calculator and floor joist calculator usually need clear span/spacing math in construction units. HammerCalc keeps that dimensional work in the same app as your framing tools — not a separate spreadsheet.
A rafter page owns pitch and common/hip lengths. A beam span calculator / joist page owns the floor and beam layout language people actually type into Google — so those queries stop dumping on the homepage.
For equally spaced joists: spaces = ceil(span_length ÷ spacing), then joist_count = spaces + 1 (including both ends). Always confirm species, grade and span tables for structural sizing — HammerCalc helps with the dimensional takeoff math around the layout.
16 ft span @ 16 in O.C. → 16×12/16 = 12 spaces → 13 joists
A basic floor joist calculator count before ordering:
A framing-oriented calculator for dimensional layout math around beams and joists — spans, spacing counts and related feet-inch work.
No. Use code-approved span tables or an engineer for structural sizing. HammerCalc helps with the measurement and takeoff math around the layout.
Often the same spacing/count math with roof-specific geometry nearby — pair this page with the rafter and roof pitch tools.
Rafters focus on pitch and roof member lengths. Beam/joist queries focus on spans and spacing layouts.
Beams, joists, rafters, stairs — framing math in HammerCalc.
