Honest comparisons with the incumbents, how the method works, and how we validate it.
Use Excel as a controlled front end for lateral pile analysis: cell inputs, results from a p-y API, plus security, limits, provenance, and review checks.
July 24, 2026
Compare lateral pile automation workflows: LPILE multi-file batch runs and Excel export, RSPile Python scripting, and PileCalc REST APIs.
July 24, 2026
An engineer's three-way comparison of LPILE, RSPile, and PileCalc: pricing, p-y libraries, scripting, sign conventions, case evidence, and open gaps.
July 2, 2026
LPILE 2026 costs $1,200 per seat plus $180/yr maintenance. Full Ensoft price list, 3-year cost of ownership, and how RSPile, AllPile, and PileCalc compare.
July 2, 2026
What COM624P is, why the free FHWA p-y program is hard to run in 2026, and the modern implementations of the same method — LPILE, RSPile, and PileCalc.
July 2, 2026
What a p-y curve is, where the classic curves come from, the main model families for clay, sand, and rock, and how p-y solvers actually use them.
July 2, 2026
An eight-step lateral pile design procedure: soil parameters, p-y models, EI, head fixity, loads, governing limits, group effects, and sanity checks.
July 2, 2026
Broms (1964) gives ultimate lateral pile capacity by hand; the p-y method gives the full nonlinear response. When each applies, with a comparison table.
July 2, 2026
How piles carry axial load through shaft friction and tip bearing: α and β side-friction methods, 9·c and Nq end bearing, limiting depth, and load transfer.
July 2, 2026
The Converse-Labarre formula worked out, block-failure checks in clay, efficiency vs spacing, and row-by-row p-multipliers for lateral pile groups.
July 2, 2026
How negative skin friction develops, the neutral plane, why dragload does not reduce bearing capacity, mitigation, and how PileCalc computes downdrag.
July 2, 2026
The Matlock (1970) soft clay p-y model explained: pᵤ equations, J factor, y₅₀ = 2.5·ε₅₀·b, static vs cyclic curves, parameter tables, and a worked example.
July 2, 2026
Welch & Reese (1972) stiff clay p-y model for clay above the water table: quarter-power curve, cyclic log₁₀N deflection growth, ε₅₀ values, worked example.
July 2, 2026
Reese, Cox & Koop (1975) stiff clay p-y model below the water table: brittle post-peak behavior, As/Ac coefficients, ks/kc values, and a worked example.
July 2, 2026
The Reese (1974) sand p-y model: wedge and flow ultimate resistance, A and B coefficients, piecewise curve construction, parameters, and a worked example.
July 2, 2026
The API sand p-y model (O'Neill & Murchison 1983): C1/C2/C3 coefficients, the tanh backbone, the A factor, k selection, and how it differs from Reese (1974).
July 2, 2026
The Reese (1997) weak rock p-y model: ultimate resistance from qu and RQD, initial stiffness kir·Eir, the krm strain factor, a worked example, and limitations.
July 2, 2026
Method provenance, equation-level agreement, numerical benchmarks, and why we deliberately check against two independent codes — not one.
June 10, 2026
The same FHWA COM624P p-y method, validated to within a few percent of LPILE — minus the Windows dongle. An honest comparison.
May 28, 2026
Match AllPile's all-in-one breadth — lateral, axial, groups, shafts, footings — with a 2026 UI, transparent methods, and shareable projects.
May 14, 2026