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Home / Products / Div 08 41 13 — 08 41 13 / Trifab VersaGlaze 451T Framing System
KawneerStorefrontDiv 08 · OpeningsNo manufacturer photo on file
Div 08 41 13 · 08 41 13

Trifab VersaGlaze 451T Framing System

K
Kawneer · Trifab VersaGlaze 451T

Thermally broken aluminium storefront framing system on a 2 in. by 4-1/2 in. nominal profile, offered in centre-plane and front-plane glazing configurations for punched-opening and ribbon storefront construction. The manufacturer's guide specification states air leakage, water penetration resistance and structural design load criteria against ASTM test methods, and publishes guide-specification U-factors at an assumed 0.28 centre-of-glass value. Description written by BuildSpec from the manufacturer's published specification; no marketing copy reproduced.

✓ Verified 2026-09-11Contributes to 2 LEED credits

Specifications

Profile2" x 4-1/2" nominal, thermal
Air leakagenot more than 0.06 cfm/ft2 (0.3 l/s·m2) at 6.2 psf (300 Pa), with interior seal, per ASTM E 283
Water penetrationno leakage at a minimum static air pressure differential of 8 psf (383 Pa) per ASTM E 331, as defined in AAMA 501
Structural design load35 psf (1680 Pa) positive and negative per ASTM E 330; no deflection in excess of L/175 of the span of any framing member
U-factor, centre plane (0.28 COG)0.38 Btu/hr/ft2/°F (guide-specification value; project-specific value to be stated per AAMA 507 or NFRC 100)
U-factor, front plane (0.28 COG)0.40 Btu/hr/ft2/°F (guide-specification value; project-specific value to be stated per AAMA 507 or NFRC 100)

Certifications & Standards

ASTM E 283, E 331 and E 330 named as the test methods for air, water and structural criteria in the manufacturer's guide specification
NFRC NFRC 100 named by number in the guide specification as a project-specific U-factor rating method (alternative to AAMA 507); no NFRC-labelled value is published in the document
AAMA AAMA 501 (water test definition), AAMA 507 (U-factor rating alternative), AAMA 1503 and AAMA 1801 named by number in the guide specification
What was checked, and what is deliberately not claimed
Correction_2026-09-11
PRIOR STORED SPEC U-Factor 0.48 REMOVED AS UNCORROBORATED. It had no first-party source (row was fill-or-withdraw, source_url null). The manufacturer's own November 2025 guide specification publishes 0.38 (451T centre plane) and 0.40 (451T front plane) at 0.28 COG, and 0.47 for the NON-THERMAL 451 centre plane. 0.48 matches none of these. It is not a 451T figure on any evidence retrieved and has been replaced rather than carried forward.
Prior_certifications_2026-09-11
PRIOR STORED certifications were [{AAMA: certified},{NFRC: certified}] with no source. The guide specification does NOT state that the system is AAMA-certified or NFRC-certified; it names AAMA and NFRC standards by number as rating and test methods. Replaced with what the document actually states.

Sustainability

Recycled Content
70% aluminum
LEED Contribution
MR: Building Product Disclosure & Optimization · MR: Sourcing of Raw Materials

Code sections

Sections of the model codes that address this type of product. A link opens the code library at the chapter that holds the section. It points to the code; it does not say this model meets it.

  • IECC C402.5.4
  • IECC C303.1.3

Applies to Code Sections

Code sections where this product or product category is relevant. Click through to the viewer for full text and commentary.

IECC 2021 C402.5.4IECC 2021 C303.1.3