Calculateur d'Espacement des Armatures Gratuit

Calculez l'espacement optimal des barres d'armature pour dalles, semelles et murs en béton armé.

feet
inches
inches

Min concrete cover from edge to first bar

Number of Bars

30

Espacement réel12.21 inches
First Bar from Edge3.0 inches

Number of Bars vs Span Length

Voir la formule →

Formule

## How to Calculate Rebar Spacing ### Formula **Usable Span = Total Span - 2 × Edge Cover** **Number of Bars = floor(Usable Span / Spacing) + 1** **Actual Spacing = Usable Span / (Number of Spaces) × 12** Edge cover is the minimum distance from the edge of the concrete to the nearest rebar. Typical cover is 3 inches for cast-against-ground concrete and 1.5 inches for formed surfaces.

Exemple Résolu

Rebar across a 30 ft span at 12-inch spacing with 3-inch edge cover.

  1. 01Cover in feet = 3 / 12 = 0.25 ft
  2. 02Usable span = 30 - 2 × 0.25 = 29.5 ft
  3. 03Spacing in feet = 12 / 12 = 1.0 ft
  4. 04Number of bars = floor(29.5 / 1.0) + 1 = 30 bars
  5. 05Actual spacing = 29.5 / 29 × 12 = 12.21 inches