Concrete yardage,
solved by dual independent methods.
3DCP yardage & cost estimating. Every volume is cross-checked by two methods that must agree within 0.001 yd³. Walls pair a closed-form algebraic prism with a discrete bead-layer summation (layers × beads × 1″×1.5″ × length). Footings use discrete form-board pour-lifts; foundation uses bead-layer stem + screed pour-lift slab − sleeve segments — construction-process models, not Simpson-of-constant continuum. Cavalieri / line / disk integrals remain optional verification details only. Exterior cavity walls also carry a third probabilistic check (Halton quasi-Monte Carlo, N = 200 000).
Inputs
L_int = (k_i · A) / H = (0.70 · 2000) / 9 = 155.556… ft → rounded to 156 ft
L_print = P_ext + L_int = 183 + 156 = 339 ft
Per-story wall height (default 9 ft). Multi-story stacks this height × stories — not one taller continuum wall. Total printed wall height = stories × story height.
IRC 2021 §R403.1.4 / R403.1.4.1 (OUBCC-adopted OK Residential Code path); unconfirmed: Tulsa-metro 18″ AHJ frost-depth planning value — IRC requires exterior footings below the jurisdiction frost line (Table R301.2(1) as filled by the AHJ). Oklahoma adopts the IRC via the OUBCC (currently the IRC 2018 permanent rule; same frost-protection principle as IRC 2021 §R403.1.4). The 18″ Tulsa-metro figure is an unconfirmed planning value from secondary climate tables (OK averages commonly listed ~12–24″) — not a verified City of Tulsa / Tulsa County ordinance citation. The 20″ × 12″ footing is paired with Foundation Depth (≥ 6″ stem-wall above footing top; default 24″ stem-wall places footing bottom at 36″ below grade). Engineer of record and local AHJ verify the governing frost depth.
Slab-on-Grade: slab is poured directly on prepared ground; no stem walls. Slab volume is folded into Foundation total.
Per spec: the stem wall's height is the depth of the foundation — same field.
Pleet3D internal (3DCP void-column reinforcement) — Vertical #5 dowels every 16″ in the 9″ void column; horizontal #4 every 24″ (courses scale with wall height); #4 @ 12″ slab mat. Internal planning schedule, not an ACI/IRC code-required pattern.
Pleet3D internal — Pleet3D delivers directly to the owner; no general-contractor markup.
Applied on top of base concrete cost; defaults from the selected standard but is editable.
Estimate
Scenarios · save / load / compare
Persist estimate inputs locally in this browser or as a JSON file. Reload anytime. Pin two scenarios (e.g. steel vs GFRP, 1-story vs 2-story) for side-by-side deltas. Every save and export embeds the estimation-only legal notice — not PE-sealed engineering.
No scenarios saved in this browser yet. Save the current estimate or load a JSON file to start a library.
Pin two scenarios (live calculator and/or library entries) to open the side-by-side comparison panel.
Engineering Validation Panel
Self-check match ≤ 0.001 yd³Every volume is solved by two methods that must agree ≤ 0.001 yd³. Walls use a closed-form algebraic prism (Method 1) and a discrete bead-layer summation (Method 2) — physically distinct formulations (layer count × beads × 1″×1.5″ bead section × length), not two names for the same product. Footings Method 2 is discrete form-board pour-lift summation (lift count × W×h_lift × perimeter). Foundation Method 2 is a discrete composite: bead-layer stem + screed pour-lift slab − sleeve segment rough-ins. Continuum Cavalieri / line / disk integrals (Simpson 1/3) are retained only as optional verification details — not primary Method 2. Exterior cavity walls additionally carry Method 3 — quasi-Monte Carlo (Halton b=2,3,5, N=200 000) as a probabilistic sampling check.
+Verification detail — continuum check
+Verification detail — continuum check
+Verification detail — continuum check
+Verification detail — continuum check
Tulsa Mix — June
unconfirmed: auto-selected per internal Concrete_Math PDF (2026-04-22) only — climate/mix monthly table not yet independently double-sourced. Avg high 88 °F · Warm/Summer · 75–85% RH · thunderstorm risk High.
Print Time — SQ4D ARCS
Assumptions
- Vendor/internal: SQ4D (Aiman Hussein memo, 2026-03-31) planning speed 500 in/min (41.67 ft/min); 700 in/min is reachable but not sustained — not a third-party code rate.
- Door & window openings count in time (travel-line through openings) — full Print-Path LF is used.
- Layer count = wall height (in) / bead height (1″).
- Layer change / start-stop overhead is configurable; default 0 s.
Rebar Schedule
RecommendedPleet3D internal (3DCP void-column reinforcement) — Vertical #5 dowels every 16″ in the 9″ void column; horizontal #4 every 24″ (courses scale with wall height); #4 @ 12″ slab mat. Internal planning schedule, not an ACI/IRC code-required pattern.
Derivation
- Vertical: perimeter × 12 ÷ spacing = bars; bars × wall height × lb/ft.
- Horizontal: perimeter × courses × lb/ft (courses from wall height ÷ stated spacing when the standard claims continuous vertical spacing; fixed for top+bottom / custom).
- Slab mesh: #4 @ 12″ o.c. each way: 2 × (12/12) ft/sqft × 0.668 lb/ft = 1.3360 lb/sqft
- Steel: total linear footage × steel density (lb/ft). GFRP: same linear footage × GFRP density (~25% of steel by weight; unconfirmed: manufacturer/distributor planning densities — not ACI 440.1R-15 Table 1.1; confirm product datasheet). Cost = weight × rate (steel $1.05/lb, GFRP $5.50/lb). The GFRP $/lb is derived from 2026 distributor per-linear-foot quotes (#4 ≈ $0.80–$1.10/ft, #5 ≈ $1.05–$1.35/ft; Owens-Corning Pinkbar+, Hughes Bros. Aslan, Pultron Composites, Tulsa metro). Total GFRP installed cost runs ~3–4× steel — high enough to reflect the corrosion-immunity premium, not the artificial 4× delta a same-weight assumption would produce.