मुफ्त रीबार कैलकुलेटर
कंक्रीट के लिए आवश्यक रीबार (सरिया) की गणना करें। स्लैब का माप और रीबार की दूरी दर्ज करें।
On center spacing, typically 12" to 24"
Standard rebar comes in 20 ft lengths
Total Bars (both directions)
28
Total Bars (both directions) vs Slab Length
सूत्र
## How to Calculate Rebar Needed ### Formula **Bars Along Length = floor(Width / Spacing) + 1** **Bars Along Width = floor(Length / Spacing) + 1** Rebar is laid in a grid pattern (both directions). Standard rebar comes in 20-foot lengths. Overlap joints should be at least 24 bar diameters (about 18 inches for #4 rebar). Common sizes are #3 (3/8"), #4 (1/2"), and #5 (5/8").
हल किया गया उदाहरण
A 20×20 ft slab with rebar on 18-inch centers, using 20 ft rebar.
- 01Spacing in feet = 18 / 12 = 1.5 ft
- 02Bars along length = floor(20 / 1.5) + 1 = 14 bars (each 20 ft long)
- 03Bars along width = floor(20 / 1.5) + 1 = 14 bars (each 20 ft long)
- 04Total bars = 14 + 14 = 28 bars
- 05Total linear feet = 14 × 20 + 14 × 20 = 560 lin ft
- 06Rebar sticks = 560 / 20 = 28 sticks
अक्सर पूछे जाने वाले प्रश्न
What size rebar for a 4-inch slab?
#3 (3/8 inch) or #4 (1/2 inch) rebar on 18-24 inch centers is standard for 4-inch residential slabs. Some codes allow welded wire mesh (6×6 W1.4/W1.4) instead.
How much do I overlap rebar joints?
The standard splice length is 24 bar diameters minimum. For #4 rebar (1/2 inch), that is 12 inches. For #5 rebar (5/8 inch), that is 15 inches. Many specs call for 18 inches minimum.
Where should rebar be placed in a slab?
Place rebar at 1/3 of the slab thickness from the bottom, supported on chairs (rebar supports). For a 4-inch slab, the rebar should be about 1.5 inches from the bottom.
सीखें