SafeSite Construct™ — Offline Field-Safety & Construction Engineering Calculators
SafeSite Construct™ Ultimate is a single-file, fully offline suite of construction safety calculators and structural engineering tools built for the field. Run pressure-test exclusion screening, rigging and crane checks, AISC steel verification, fire and confined-space logic, and a full set of field-safety workflows — entirely in your browser, with no login, no server, and no internet connection required. Every result is traceable, and every saved record is written to a tamper-evident audit trail, with QR code, PDF, and spreadsheet reporting.
Built by AIEnginear.com for engineers, supervisors, riggers, and EHS professionals working in oil & gas, EPC, refining, and heavy construction.
One offline app, fifteen engineering modules
SafeSite Construct™ replaces a folder of scattered spreadsheets with one auditable tool that works on the laptop in a site cabin or the phone in your pocket — even with no signal.
- Pressure-Test Exclusion — stored-energy / TNT-equivalent screening for pneumatic and gas testing, with indicative barricade distances (API 521 / ASME PCC-2 guidance).
- Rigging & Lifting — sling leg tension and utilization (ASME B30.9), crane outrigger ground-bearing pressure, and a critical-lift classifier.
- Structural Steel — beam bending and deflection checks, beam auto-selection, column buckling and slenderness (AISC 360 Chapter E), fillet weld capacity (Chapter J), and combined axial-plus-bending interaction (H1).
- Hazard & Fire — section-factor fireproofing screening, a LOTO isolation-procedure builder, and confined-space atmospheric classification (OSHA 1910.146).
- Advanced Field Safety — excavation sloping (OSHA Subpart P), scaffold duty and base-bearing checks (Subpart L), a hot-work permit generator (NFPA 51B), and a PPE recommendation engine.
Engineering traceability you can stand behind
Every calculation shows the actual equation and the numbers behind it, not just an answer. Inputs are range-checked, results carry a clear pass/review/action verdict, and each module cites the standard it follows. Material allowables, section properties, and product data stay user-entered from your own licensed sources — so the tool supports your judgment rather than hiding it.
Tamper-evident audit trail, QR & PDF reporting
Saved records are linked in a SHA-256 hash chain and signed on-device with an ECDSA key, each tagged with a unique certificate ID. A one-click verify recomputes every hash, checks the chain links and timestamp order, and validates each signature, so any later edit is detected and located. Generate branded PDF verification certificates with mathematical traces, inspector signature blocks, and a scannable verification QR code — or export the full register to XLSX and JSON. A built-in permit-to-work register tracks documents from draft to closed.
Works offline. Owns its data. No lock-in.
SafeSite Construct™ is a single HTML file with zero dependencies and no external calls. It runs from a browser tab, embeds cleanly in WordPress via an iframe, and stores everything locally on the device. No accounts, no telemetry, no cloud — your project data never leaves your hardware.
Who it’s for
Lifting supervisors and riggers planning lifts; mechanical and piping engineers screening pneumatic tests; structural engineers running quick member checks; commissioning and EHS teams managing permits, confined-space entries, and excavations; and EPC field teams that need defensible documentation without a network.
Professional use & verification
SafeSite Construct™ is an engineering decision-support and documentation aid for qualified professionals. All outputs are indicative and intended for preliminary screening — they are not a certified design, an approved permit, or a substitute for the governing edition of each standard, site-specific analysis, or the judgment of a competent person. Verify and approve all safety-critical results within your organization’s safety-management and permit-to-work systems before any field use.
Frequently asked questions
Does SafeSite Construct work offline? Yes. It’s a single self-contained HTML file with no server, CDN, or external requests. Once loaded, it runs entirely in the browser and continues working even without an internet connection.
Which standards does it reference? The modules follow methods aligned with API 521 / ASME PCC-2 (pressure-test exclusion), ASME B30 (rigging and lifting), AISC 360 (steel members, welds, interaction), NFPA / API RP 2218 (fire), and OSHA 1910 / 1926 (confined space, excavation, scaffolding, hot work). Outputs are screening-grade and must be verified against the governing standard edition.
Is the audit log secure? Records are hash-chained with SHA-256 and signed on-device with an ECDSA key, making the log tamper-evident: any change to a saved record breaks verification. Records are stored locally per device — it’s local, verifiable evidence, not a shared cloud database.
Can I embed it in my WordPress site? Yes. Host the HTML file and embed it with an iframe (auto-resize supported). Because it uses local storage for its audit trail, host it at a real URL rather than as an inline data URI.
Is it a substitute for a professional engineer? No. It’s a decision-support and documentation tool. All safety-critical results must be reviewed and approved by a qualified, competent person before field use.
