The retained arithmetic agrees with independent calculations. The drawings still have gaps, and the support examples do not establish installation safety.
14project records19source sheets reviewed90retained component records28fixed rows missing mass inputs
What the check establishes
All 90 retained component records were recomputed from their transcribed rectangles or polygons, using exact inch conversion, stated thickness and stated density. CSV quantities agree. These records represent 100 copies, but alternative sheets and different jobs must not be added into one job total. Project 10 has one additional visual-only estimated top.
All 90 support examples satisfy force and moment balance. Checks also covered 79 earlier editable records, 14 closed preview meshes and 150 sample slab layouts. A mathematically balanced model can still be based on the wrong dimensions or supports.
Gross means before openings. Sink and electrical templates, radii and joint overlaps have not been deducted from the fixed tables. This may overstate self-weight, but it does not make a strength check conservative: a cutout can weaken the stone and move its centre of mass.
The underlying source has 32 records without enough mass inputs. Four Project 1 values are separately labeled estimates, leaving 28 blank fixed rows. Blanks mean missing information, not zero. Support pages use stated scenario assumptions, so their masses can differ from the fixed tables.
What changed in this review
Reject impossible-size openings and numeric overflow in interactive tools.
Align vertical force-pair arrow distance with assumed h; not anchor positions.
Render future located rounded openings with rounded geometry.
Use inclusive Caesarstone density lower bound ≥2100 kg/m³.
Show the current 17-material register and allow search by additional material codes.
Label gross mass estimates, per-piece quantities, missing inputs and earlier teaching-model scope.
Use project-specific headings and shorter personal copy.
No retained drawing dimension or job mass was silently invented or replaced. The 68-inch Project 10 top remains a visual estimate without a load calculation. Product-family and comparison densities remain estimates.
Internal links, fragment targets, local assets, JSON/CSV downloads and JavaScript syntax are checked separately before publication. External source availability is reported below rather than assumed.
Project-by-project notes
Visual review used the supplied paper images, not a site visit or a calibrated measurement. Small fractions and crossed handwriting can remain ambiguous.
25.5 × 15 detached counter and 31.125 × 15.5 desk match retained rectangles.
129.375 × 27.375 main counter is only an envelope; missing front-step dimensions prevent an exact model.
Still needs confirmation
Thickness mark visually appears to read 3 cm; existing transcription deliberately leaves it null because handwriting is partly obscured. Ask for confirmation, or explicitly label 30 mm as a tentative drawing reading.
Main stepped counter needs missing step/arm depth dimensions.
Nominal 29.75 × 15.75 U/M sink, 1-inch radius must be checked against cutting template.
Supplier families and comparison ranges support the selected estimates; no exact project slab or batch density was verified. Primary sources were checked during the October 2026 review. Some direct pages timed out, including the Canadian TCE product-information PDF and older Caesarstone sheet; the report records those access limits. Group Italy and Quantum comparisons were available as primary-domain search excerpts rather than full retrieved pages.
Manufacturer and physics sources
Guava brand density — ASTM C97 density2.44g/cm3 =>2440kg/m3. Applies as a brand reference, not measured AGQ8730/AGQ9695 or project batch. Existing qualification is appropriate.
TCE historical family range — 2018 Oceania SDS p4 reports2.188–2.405g/cm3 =>2188–2405kg/m3. Current Canadian product/batch applicability is unconfirmed; 2400 remains an explicit estimate.
Polycor generic marble proxy — EPD p4 density2699kg/m3 confirmed. Does not identify or characterize the unknown Marble-Green in Project14. Existing generic-proxy qualification appropriate.
AGQ product identity: Source 1 · Source 2 — AGQ8730=Tramonto; AGQ9695=CALACATTA LAURENCE on this catalogue. Code retained because previous catalogues conflict; no need to force a single styling name.
TCE extra-code identity: Source 1 · Source 2 — Names Icy Mist and Statuario Grigio and20/30mm offerings confirmed. No density stated in inspected product results.
Caesarstone density basis: Source 1 · Source 2 · Source 3 — 20mm family43–48kg/m2 =>2150–2400kg/m3.30mm66–70kg/m2 =>2200–2333kg/m3.2300 is within these family ranges; no exact4043 density established. Canadian manual p28 lower bound ≥2100kg/m3.
Vicostone BQ6716: Source 1 · Source 2 — Family apparent-density range2.1–2.3g/cm3 =>2100–2300kg/m3;2200 midpoint estimate appropriate if labeled. Product identity BQ6716 Vitoria Regia confirmed. Quartz styling inspiration does not make it natural quartzite.
Other-brand quartz comparison densities: Source 1 · Source 2 — Primary indexed excerpts support GroupItaly2.4–2.5g/cm3 and Quantum2.10–2.45g/cm3. These are comparison ranges of unrelated producers, not specifications for Q/TP/Kasa/Y codes. No estimate upgrade justified.
Selected components do not form a complete-job inventory.
No native student CAD files, field measurements, exact slab-density certificates or actual support/anchor details were supplied.
Sink/electrical templates, joint overlaps, stone bending/deflection and connection resistance remain unverified.
Some external sources timed out; no full external-link availability pass is claimed.
Personal checks and native Fusion/AutoCAD models still need to be recorded. The existing views are reconstructed from supplied drawings; personal CAD files and reviews are still pending.