DC5040 – I-Joists2018-11-17T02:14:43+00:00
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I-Joist and Engineered Wood Framing Members Fire Resistance

DC5040 is a water based thin film intumescent coating providing fire resistance to I-Joist and engineered wood framing members. Applied to the I-Joist only, once the I-Joist are installed, DC5040 provides equivalence to the 2-by-10-dimension lumber prescribed in Section R302.13, Exception 4 of the 2015 IRC® and Section R501.3, Exception 4 of the 2012 IRC®.

DC5040 has been fire tested in accordance with a full-scale ASTM E-119 and meets IAPMO UES Acceptance Criteria EC017 for Field-Applied Fire Protective Coatings.

Evaluation Report

DC5040 has been evaluated for use as a fire-protective coating for wood-based products. The coating has been evaluated as part of a fire-resistance-rated assembly and for interior finish. The fire resistance, surface burning characteristics, durability, and effects on mechanical properties of the I-joist comply with the intent of the provisions of the following codes and regulations:

  • 2018, 2015 and 2012 International Residential Code® (IRC)

Product Listing

DC5040 is a water based thin film intumescent coating used to provide fire resistance to engineered wood framing members such as I-Joists.

  • ASTM E119 “Standard Test Method for Fire Tests of Building Construction and Materials”.
  • ASTM E84 “Standard Test Method for Surface Burning Characteristics of Building Materials”.
  • ASTM E84 “Standard Test Method for Surface Burning Characteristics of Building Materials”, extended 20 minutes.
  • ASTM E2768 “Extended Duration Surface Burning Characteristics of Building Materials (30 Min Tunnel Test)”.