Hi All,

For those working in NYC LPC projects, how do you meet the ASTM E84 requirements for windows.  Wood windows don't fall in this category unless they have fire-retardant wood which I doubt most people specify for cost reason.   Is there an exception?

I usually specify aluminum and upvc windows for NON-LPC project, but they are not acceptable for Landmark Projects

Code section 806.5 says: Material, other than foam plastic used as interior trim, shall have a minimum Class C flame spread index as
described in Section 803.1.1 and maximum smoke-developed index
of 450, when tested in accordance with ASTM E 84 or UL 723.
Combustible trim, excluding handrails and guardrails, shall not exceed 10 percent of the specific wall or ceiling area in which it is attached.

Definition of Trim in code:

TRIM: Picture molds, chair rails, baseboards, handrails, door and window frames and similar decorative or protective materials used in fixed applications.

Thank you