Deviation Report: Gypsum Board 09 29 00
Submittal proposes 1/2 inch Type X gypsum panel for 1-hour fire-rated hospital partitions; spec explicitly prohibits thickness substitution in fire-rated assemblies and requires 5/8 inch under UL Design L501.
Submittal:
- Product: USG Sheetrock Brand Firecode Type X gypsum panel, 1/2 inch thickness, 4 foot by 8 foot, tapered edge.
- Manufacturer: USG (United States Gypsum Company), manufactured at Plaster City, California.
- Intended location: all interior partitions including 1-hour fire-rated patient corridors, exit access corridors, and smoke-compartment partitions (approximately 184,000 square feet).
2
Blocker
3
Fix-and-Resubmit
0
Note-Only
Top findings:
1.
Detail or Installation Mismatch
Blocker
2.
Performance Specification Gap
Blocker
3.
Missing Certification or Compliance Documentation
Fix-and-Resubmit
2 additional finding(s) detailed on subsequent pages.
PM signature: ________________________________ Date: ____________
Detailed findings
1. Detail or Installation MismatchBlocker
Spec:
Basis-of-design product (1-hour fire-rated walls): USG, Sheetrock Brand Firecode Type X gypsum panel, 5/8 inch thickness ... Thickness: 5/8 inch (15.9 millimeters) minimum. ... Substitution of gypsum-panel thickness or type is NOT permitted in fire-rated assemblies. (Section 09 29 00, 1.1.B and 2.1.A)
Submittal:
Thickness submitted: 1/2 inch (12.7 millimeters)
Action: REJECT. Resubmit with 5/8 inch Type X panel as required. Severity escalated/held at Blocker because this is an acute-care hospital with life-safety code applicability and spec 1.1.B explicitly prohibits thickness substitution in fire-rated assemblies.
2. Performance Specification GapBlocker
Spec:
UL Design L501 (or Architect-approved equivalent UL Design): 1-hour fire-resistance rating verified. (Section 09 29 00, 2.2.A.1)
Submittal:
UL Design L501 references the 5/8 inch Type X panel. The 1/2 inch Type X panel submitted here is covered under separate UL Designs (L502, L506) for non-load-bearing partition use.
Action: REJECT. Submitted panel is not listed under UL Design L501 as scheduled. Sub has not obtained Architect-approved equivalent UL Design in writing. Blocker because fire-resistance rating of the as-built assembly cannot be verified against the spec'd listing.
3. Missing Certification or Compliance DocumentationFix-and-Resubmit
Spec:
UL fire-resistance design listing: copy of the UL Design L501 listing card, or the UL Design referenced in the Drawings, demonstrating that the proposed assembly meets the 1-hour fire rating specified. (Section 09 29 00, 1.2.A.2)
Submittal:
UL Design listing card is on file at the manufacturer; can be provided upon Project Manager (PM) request.
Action: Require UL Design listing card to be attached to the resubmittal package. Spec requires the copy in the submittal, not on request. Held at default Fix-and-Resubmit; resolution will be moot if the thickness Blocker forces a full resubmittal anyway.
4. Missing Certification or Compliance DocumentationFix-and-Resubmit
Spec:
ASTM test reports: ... b. Fire endurance per ASTM E119 (the panel manufacturer's test under the specific UL Design referenced). (Section 09 29 00, 1.2.A.3.b)
Submittal:
Attachment B: ASTM E84 surface burning test report (no ASTM E119 fire endurance report listed in attachments or table)
Action: Require ASTM E119 fire endurance test report tied to the specific UL Design proposed. Default Fix-and-Resubmit; in practice this will be resolved as part of the broader resubmittal triggered by the thickness Blocker.
5. Submittal Package IncompletenessFix-and-Resubmit
Spec:
Warranty: sample of manufacturer's standard limited warranty against manufacturing defects. (Section 09 29 00, 1.2.A.4)
Submittal:
Manufacturer's standard warranty terms are included in the product data sheet (Attachment A). Separate warranty document not enclosed.
Action: Require the standalone manufacturer's standard limited warranty document. A reference inside the data sheet does not satisfy the spec request for a warranty sample. Default Fix-and-Resubmit.
Redlines
- 1.1.B: 'Substitution of gypsum-panel thickness or type is NOT permitted in fire-rated assemblies.'
- 2.1.A.1: 'Thickness: 5/8 inch (15.9 millimeters) minimum.'
- 2.2.A.1: 'UL Design L501 (or Architect-approved equivalent UL Design): 1-hour fire-resistance rating verified.'
- 1.2.A.2: 'copy of the UL Design L501 listing card ... demonstrating that the proposed assembly meets the 1-hour fire rating specified.'
- 1.2.A.3.b: 'Fire endurance per ASTM E119 (the panel manufacturer's test under the specific UL Design referenced).'
- 1.2.A.4: 'Warranty: sample of manufacturer's standard limited warranty against manufacturing defects.'
Reviewer notes
Note for PM: the thickness deviation classifies cleanly as a Detail or Installation Mismatch per the taxonomy example (5/8 inch vs 1/2 inch Type X), and is escalated to Blocker because Section 1.1.B is explicit and the project is acute-care hospital life-safety. The UL Design mismatch is logged separately as a Performance Specification Gap because the submitted panel is not listed under L501 at all. PM should also visually confirm in the field/shop drawings that no 1/2 inch panel has already been ordered or delivered to site; if so, coordinate return/replacement before any framing is closed in. Sub kept the USG manufacturer (basis of design), so this is not a manufacturer substitution; the issue is thickness and UL listing only.
Generated 2026-05-06T15:12:26