Windows Desktop App · Free

Check beam openings in seconds.

ACI Beam Horizontal Opening Checker screens pipe and conduit openings in a reinforced-concrete beam against ACI 314R-11 §6.8.2.2 (conduits passing through) and §6.8.2.3 (conduits embedded longitudinally) — with a live elevation + cross-section sketch that redraws on every keystroke.

✓ Free v1.0.0 Windows 10 / 11 · 64-bit ~2.1 MB installer

↓ Download for Windows Read the scope & disclaimer

✓ ALL CHECKS PASS

Scope

Two clauses, checked thoroughly

Every check the guide requires — plus the pair and zone checks it's easy to miss by hand.

§6.8.2.2 — Through beams & joists

Transverse conduits passing through girders, beams, and joists — size limit, middle-third band, and prohibited-zone location checks.

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§6.8.2.3 — Longitudinal conduits

Conduits embedded along the beam's length — its own size and band rules, with an explicit "not applicable" row for span location.

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Middle-third band, both axes

Depth and width bands checked edge-to-edge, matching how Fig. 6.8.2.2 draws the pipes wholly inside the band.

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Five-zone span partition

Prohibited/permitted zones mirrored at both ends of the span — all five zones drawn on the elevation, not just the two the guide names.

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All-pairs spacing checks

Every pair checked, not just adjacent ones — required in the 2D section, where two non-adjacent pipes can still nearly touch.

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Two interpretation switches

The clause text is ambiguous on location basis and spacing basis for unequal pipes. Both are exposed in the UI, defaulting to the conservative reading.

Built Conservatively

Never oversells a result

The banner never reads a bare PASS — the best attainable verdict is PASS WITH REVIEW ITEMS, by design.

✓

Always PASS WITH REVIEW

All three advisory items are permanently flagged Review by design — never auto-passed. The acknowledgement checkbox gates export; it never upgrades the verdict.

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Nothing silently skipped

A longitudinal conduit still gets an explicit "span location — not applicable" row, so an inapplicable check is never mistaken for an oversight.

No NaN ever reaches a row

Degenerate geometry yields a 999.0 sentinel and a Fail; non-numeric rows carry an explicit flag and print an em dash instead.

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Live redraw, every keystroke

The elevation and cross-section sketch redraw on every keystroke, cell edit, add, delete, and unit switch — nothing needs a recalculate button.

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PNG export, both sketches

Export the elevation and cross-section sketches to PNG for your calculation package, alongside the full pass/fail report.

✓

26 / 26 tests, zero warnings

Release build treats every warning as an error. The full acceptance suite — 26 tests covering every clause and edge case — passes before each release.

Requirements

Runs on almost any Windows PC

Operating systemWindows 10 or 11 · 64-bit
Runtime.NET Framework 4.8
Sign-inGoogle account, verified each launch
InternetRequired each launch
Storage< 1 MB installed
PriceFree

⚠

This tool performs geometric screening only against ACI 314R-11, a guide document — ACI 318 governs. A PASS result does not certify structural adequacy and does not relieve the engineer of record of responsibility for the design.

A FAIL result means the simplified provisions no longer apply and the opening needs explicit design (chord and diagonal reinforcement, Vierendeel action) — out of scope here. Reinforcing bars must not be cut or damaged at any location without the licensed design professional's approval.

Read the full disclaimer, including the sign-in privacy notice →

Ready to check your first beam?

Download the v1.0.0 Windows installer. Sign in with Google on first launch — activation happens inside the app, no separate account creation step.

↓ Download ACI Beam Horizontal Opening Checker (v1.0.0 · 2.1 MB)

File: AciOpeningChecker_Setup_v1.0.0.exe · Windows 10/11 64-bit · RHCES Engineering Services