FIRE BARRIER BUILDING PRODUCT AND METHOD AND SYSTEM FOR MAKING SAME

摘要

Methods and processes for depositing a fire resistant barrier on a construction material involve coating exposed webbing of, for instance, an I-joist with a fire-resistant material using a wetting layer and a thickening layer. A time period between depositing the wetting layer and thickening layer is controlled to facilitate complete wetting of the exposed webbing. Filler such as fiberglass may be included in the thickening layer. The wetting and thickening layers may be deposited on the webbing in the same application. The construction material, such as the I-joist, may then be subjected to a curing treatment and additional curing period followed by coating the second side using a similar methodology.

主权项

1. A method for coating an I-joist with a fire resistant coating, comprising the steps of:
conveying an I-joist past a first delivery unit comprising at least one delivery orifice; delivering a first coating of a cementitious material on a first side of a web of the I-joist using the delivery orifice; curing the first coating; rotating the I-joist to expose a second side of the web of the I-joist; conveying the I-joist past the first delivery unit such that the second side of the web faces the delivery orifice; delivering a second coating of a cementitious material on the second side of the web using the delivery orifice; and curing the second coating, wherein the I-joist is conveyed so that a time between depositing the first coating on a portion of the web and curing the first coating is sufficient for the first coating to flow and even out; and wherein the I-joist is conveyed so that a time between depositing the second coating on a portion of the web and curing the second coating is sufficient for the second coating to flow and even out.