Rebar Splice Length Calc

On a concrete pour and need a lap splice length for epoxy-coated rebar? Pick the bar, type the concrete strength and cover, and read the development length and lap splice off one screen. Everything updates as you type. WHAT IT CALCULATES: - Bar diameter (db) for the selected bar - Tension development length (ld), using the ACI 318-19 Section 25.4 method - Lap splice length, as your selected class factor times ld (Class A = 1.0, Class B = 1.3) WHAT YOU ENTER: - Bar size: #3 through #11, plus #14 and #18 (metric #10 through #57) - Concrete strength f'c, and steel yield fy - Cover distance - Coating: uncoated or epoxy-coated - Concrete: normal weight or lightweight - Bar position: top bar or other - Splice class: A or B The factors behind the number: - Coating factor for epoxy-coated bar - Bar size factor - Lightweight concrete factor - Top-bar position factor - The combined top-bar and coating factors are capped at 1.7, as the code requires SUPPORTED: - Imperial (psi, inches) and Metric (MPa, mm), with your choice remembered between launches - Instant results as you change any input READ THIS BEFORE YOU RELY ON IT: This is a fast preliminary estimate, not a substitute for a full code check or your EOR's stamp. - It assumes the confinement term (cb + Ktr)/db = 1.5. It does not ask for bar spacing or transverse reinforcement, so it cannot take credit for tighter confinement, and it does not apply the ACI Grade 80/100 factor. Size it for Grade 60 bar and verify anything higher by hand. - It returns the lap splice for the one class you select, not both at once. - It does not do hooked or headed bar development, compression splices, or bundled bars. KEY FEATURES: - One screen, no menus, no setup - The calculator works completely offline. No account, no login, nothing you type leaves your device - $4.99 once. No subscription, no in-app purchases The app also includes a More Pro Tools card linking to our other apps on the App Store. Nothing in the calculator needs it, and nothing needs a connection. Built for structural engineers, concrete contractors, and building inspectors who want the number in seconds and know when to check it.