• Welcome to the new and improved Building Code Forum. We appreciate you being here and hope that you are getting the information that you need concerning all codes of the building trades. This is a free forum to the public due to the generosity of the Sawhorses, Corporate Supporters and Supporters who have upgraded their accounts. If you would like to have improved access to the forum please upgrade to Sawhorse by first logging in then clicking here: Upgrades

FRTW - what qualifies it

Re: FRTW - what qualifies it

Number 4 under that section calls out class "A" materials as compliant, the material proports to be Class "A", other than that, the testing seems to be from 1992BOCA, I don't see that in chapter 35 (?)
 
Re: FRTW - what qualifies it

See IBC 2303.2 and all of its sub-sections. Take a look at http://www.apawood.org/pdfs/download_pdf.cfm?PDFFilename=managed/K320.pdf at the APA web site. You may have to register, but, it's free. There is a handy table showing the code sections where it may be used.

edit: Homasote lists ES report No. 2308, but, that doesn't currently exist at the ESR web site. Most of Homasote's ES reports are for insulating and sound boards. I had this product in a Type 2A church recently, tried to use it for the choir area riser floors - didn't approve it.
 
Re: FRTW - what qualifies it

FRTW must pass standard tests for non-combustibility to be considered as such.

There are additional exposure and service issues particular to the material that may have a practical effect a particular products suitability from a design standpoint.

Many of these have been mitigated by more recent manufacturing processes and better familiarity with the differences between individual products.
 
Re: FRTW - what qualifies it

See the part that is underlined. ASTM E-84 is not the only requirement:

2303.2 Fire-retardant-treated wood.

Fire-retardant-treated wood is any wood product which, when impregnated with chemicals by a pressure process or other means during manufacture, shall have, when tested in accordance with ASTM E 84, a listed flame spread index of 25 or less and show no evidence of significant progressive combustion when the test is continued for an additional 20-minute period. In addition, the flame front shall not progress more than 10.5 feet (3200 mm) beyond the centerline of the burners at any time during the test.

Ask for the test results. And there was no 1992 BOCA. 1990, 1993, 1996...
 
Re: FRTW - what qualifies it

FRTW came into great conflict several years ago, when used as roof sheating in row homes.. it delaminated.

It's a question to ask at plan review not inspections.
 
You must log in or register to reply here.
Top