Design pile layouts from site dimensions and offsets. Compare spacing options and estimate concrete needs. Export summaries to share with teams and clients today.
All dimensions are in meters. The calculator assumes a rectangular grid with a uniform edge offset.
Use these sample inputs to validate site assumptions and compare spacing alternatives.
| Length (m) | Width (m) | Offset (m) | Spacing X (m) | Spacing Y (m) | Diameter (m) | Pile Length (m) | Waste (%) |
|---|---|---|---|---|---|---|---|
| 20 | 12 | 0.50 | 3.00 | 3.00 | 0.45 | 10 | 5 |
| 30 | 18 | 0.75 | 3.50 | 3.50 | 0.50 | 12 | 7 |
| 16 | 10 | 0.40 | 2.50 | 2.50 | 0.40 | 9 | 4 |
Accurate pile quantities start with clear plan dimensions and orientation. Use the foundation length and width that match your grid directions, not only architectural extents. Apply an edge offset to respect cover, pile caps, and tolerance zones. The usable footprint then controls how many pile centers can be placed without crowding edges or violating detailing limits. Include setbacks for utilities in the footprint.
Spacing selection balances structural demand, settlement performance, and installation practicality. Smaller spacing increases pile count and cost but can reduce individual pile loads and improve redundancy. Larger spacing reduces quantities but may increase cap sizes and punching demands. Compare multiple spacing pairs to see how the grid changes along both directions before finalizing procurement figures. Check rig access, pile diameter, and reinforcement cages when tightening spacing too.
Concrete volume per pile is estimated as a cylinder using the chosen diameter and embedment length. This supports early budgeting for batching, spoil handling, and logistics. For cast‑in‑place piles, site conditions can change actual volume due to overbreak, slump loss, and washout. Add a waste allowance that reflects your soil and workmanship risks. For bored piles, verify cutoff level and tremie placement method early.
Quality checks help confirm the layout is buildable. The end gap values show the remaining distance after placing the last pile center, highlighting whether spacing leaves an awkward short bay. If end gaps are too small, adjust spacing or offset to avoid congestion and reinforcement conflicts. Record the final counts and checks for coordination meetings. Overlay the grid on column lines to confirm load paths aligned.
Use exported summaries to align designers, contractors, and suppliers. The CSV supports quick review in cost sheets, while the PDF provides a printable snapshot for submittals and field packets. Treat results as estimating quantities until verified against drawings, geotechnical recommendations, and local codes. Update inputs whenever the pile schedule or footprint changes. Maintain version control so teams reference the same assumptions and outputs.
No. It estimates quantities for planning and budgeting. Final pile number, spacing, and sizes must follow structural analysis, geotechnical recommendations, and project drawings.
It is the setback from each foundation edge to the first pile centerline. It helps accommodate cover, pile caps, and construction tolerances.
End gaps show the remaining usable distance after placing the last pile center. Small gaps can indicate congestion or an impractical short bay.
Base it on soil conditions, installation method, and quality control. Higher waste is common with loose soils, overbreak, or difficult tremie placement.
Yes. Enter spacing X and spacing Y independently. This supports rectangular grids that match column lines or site constraints.
The volume estimate assumes a cylindrical pile. For belled, tapered, or composite piles, use this as a baseline and adjust with project-specific factors.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.