All 32 Vitro TD-120 flat-glass reference rows from 2.0 mm to 25 mm: exact millimetre conversions, published production ranges, nominal thicknesses, and weights at the Vitro 157 lb/ft³ and NGA 156 lb/ft³ density conventions. Includes panel-weight tables, a comparison to the NIOSH 51 lb RNLE load constant, ASTM standards context, and Indiana adopted-code edition. Downloadable CSV and JSON. Last fully verified July 25, 2026.
REFERENCE DESK · CODES & AUTHORITIES
Commercial Glass Reference Desk
No single reference determines the correct product or permit path for a specific opening. Federal glazing rules, the adopted building code, Indiana design-release rules, local permits, historic-district review, and right-of-way review each answer a different part of the question.
AUTHORITY TABLE
Which authority governs which part
Each row lists what an authority or standard governs, what it does not decide, where to confirm it, and when it was last checked. Values come only from sources recorded in this site’s evidence ledger.
| Authority or standard | What it governs | What it does not decide | Where to confirm | Last checked |
|---|---|---|---|---|
| 16 CFR Part 1201 — Safety Standard for Architectural Glazing Materials | Federal safety standard for covered architectural glazing materials, including impact-performance testing and certification/labeling requirements. | Whether a specific Fort Wayne opening is a hazardous location under the adopted building code, or any local permit question. | eCFR (ecfr.gov); the adopted building code governs identification at the installed hazardous location. | July 25, 2026 |
| Indiana Building Code as listed by Allen County (2012 IBC with Indiana amendments) | Adopted building-code requirements in Allen County, including safety-glazing hazardous-location provisions, subject to the code's listed exceptions and Indiana amendments. | Project-specific rulings. The provider and the authority having jurisdiction apply the rule to an actual opening. | Indiana DHS Fire & Building Safety and the Allen County Building Department | July 25, 2026 |
| Indiana amendments to the adopted building code | State amendments that control where they differ from the model code. | Local permit classification or fees. | Indiana DHS Fire & Building Safety | July 25, 2026 |
| ICC accessibility standard as listed by Allen County | Accessibility requirements referenced by the adopted code for entrances and openings. | Whether a specific entrance alteration triggers accessibility work — confirm with the issuing office. | Confirm with the Allen County Building Department | July 25, 2026 |
| Indiana construction design release rules (675 IAC 12-6) | When state construction design release is required and which limited scopes — including replacement or reglazing of glass at 675 IAC 12-6-4(b)(5)(A) — are exempt. | The separate Allen County permit question; an exemption does not remove other applicable rules. | IDHS Plan Review | July 25, 2026 |
| Allen County Building Department (ACBD) | Local permits, commercial remodel classification, the county fee schedule, and contractor licensing in its jurisdiction. | State design release, historic-district approval, or right-of-way use. | Allen County Building Department and Permits & Planning | July 25, 2026 |
| Allen County contractor licensing | Licensing of contractors and subcontractors in Allen County. Allen County states that all contractors and subcontractors must be licensed in the county; its Permits & Planning page separately says the Building Department deals directly with the licensed and registered contractor awarded the project. | Provider capability or availability for a specific request. | Allen County Contractor Licensing and Permits & Planning | July 25, 2026 |
| Fort Wayne Historic Preservation | Certificate of Appropriateness review before most exterior work in a local historic district; Allen County's electronic routing for these properties took effect November 7, 2025. | Whether a property is in a district is confirmed by address — raise it on the first call. | Fort Wayne Historic Preservation | July 25, 2026 |
| Fort Wayne right-of-way / barricade review | Review when work occupies or obstructs public space such as a sidewalk, parking lane, or street. | Building-permit or design-release questions. | City of Fort Wayne right-of-way office | July 25, 2026 |
| Indiana trade-licensing guidance | Statewide occupational licensing guidance; Indiana does not issue a statewide glazier license. | Local registration requirements, which are handled by the local building department. | Confirm with the Allen County Building Department | July 25, 2026 |
Where a value is not verified, confirm it with the listed authority rather than assuming a number or interpretation.
DEFINITIONS
Definitions
- Construction design release
- A state-level review, administered by Indiana, that must be obtained before certain construction work; limited scopes — including replacement or reglazing of glass — are named as exempt at 675 IAC 12-6-4(b)(5)(A). An exemption from design release does not remove other applicable rules.
- Local permit
- An authorization issued by the local building department. In Allen County, the Allen County Building Department classifies work, applies its fee schedule, and issues permits. It is a separate question from the state design release.
- Hazardous location
- A position for glazing that the adopted building code identifies as needing safety glazing — for example, glazing near doors or certain large low panels — subject to the code's listed exceptions and Indiana amendments. This site does not determine whether a specific opening is a hazardous location; the provider and the authority having jurisdiction apply the rule to an actual opening.
- Safety glazing
- Glazing that meets the applicable impact-performance requirement for the location. The adopted building code determines which locations require safety glazing and how installed safety glazing is identified, subject to its exceptions and Indiana amendments.
- Permanent mark
- A durable identification on installed safety glazing. Under the adopted building code, safety glazing in hazardous locations is identified under 2012 IBC Section 2406.3, subject to its exceptions; tempered glass identification is addressed in Section 2403.1 as amended by Indiana. A visible mark can help a provider identify the existing product, but it does not determine the project requirement by itself.
- Certificate of Appropriateness
- An approval from Fort Wayne Historic Preservation required before most exterior work begins in a local historic district and before a related building permit can be issued. Whether a property is in a district is confirmed by address.
- Right-of-way permit
- A City of Fort Wayne authorization required when work occupies or obstructs public space such as a sidewalk, parking lane, or street. It is separate from a building permit or a design release.
- Insulated glass unit
- A sealed assembly of two or more glass panes separated by a spacer, sometimes called an IGU. When moisture is trapped between the panes, the sealed assembly may have failed; a provider evaluates the condition and explains the options it offers.
METHODOLOGY AND LIMITATIONS
Methodology and limitations
- Official-first sourcing. Each entry traces to a government or standards source — federal, state, county, or city — rather than to secondary summaries.
- Retrieval dates. Every source is recorded with the date it was retrieved so a reader can see how current the underlying material is.
- Normalization. Sources are described in a consistent structure — what they govern, what they do not decide, and where to confirm them — so different authorities can be compared side by side.
- Review dates. Entries carry a last-checked date. The current material was reviewed July 25, 2026.
- No project-specific ruling. This page does not decide any question about a specific opening, permit, or property. The provider and the authority having jurisdiction apply the rules to an actual project.
- Rules change. Codes, amendments, fees, and processes are revised over time; confirm current requirements with the listed authority before relying on them.
- Local determinations control. Where state amendments or local determinations differ from a model standard, the local determination controls.
- Not professional advice. Nothing here is legal, engineering, code, or safety advice.
PUBLISHED RESEARCH
Published research assets
These source-normalized authority references are published and fully verified. Each is built from primary code, regulation, or official agency material with methodology, retrieval dates, and a downloadable dataset.
Compares all seven hazardous locations from the 2024 IBC and 2024 IRC side by side—with the exact triggering dimension, CPSC Category I/II impact tests, federal product scope versus building-code scope, material edition changes, and Indiana adopted-code context. Includes a downloadable CSV and JSON dataset. Last fully verified July 25, 2026.
To compare the commercial glass repair services, see the services page.
CHANGE LOG
Change log
July 25, 2026
Reference desk published. Authority table, definitions, and methodology built from sources verified on this date. Both research assets published.
CITATION
Reference details
- Title
- Commercial Glass Reference Desk | Codes & Authorities
- Publisher
- Fort Wayne Commercial Glass Repair
- Canonical URL
- https://fortwaynecommercialglassrepair.com/resources/
- Updated
- July 25, 2026