Building products with fire-resistant claddings

Patent metadata

Field	Value
Publication number	US-2017081844-A1
Application number	US-201514862369-A
Country	US
Kind code	A1
Filing date	Sep 23, 2015
Priority date	Sep 23, 2015
Publication date	Mar 23, 2017
Grant date	—

Abstract

A building product having improved fire resistance by virtue of solid fire-resistant cladding material attached to at least a portion of one or more surfaces of the building product. The solid fire-resistant cladding material includes wood fiber and binder. The building product can be a wood-based building product, and can be in the form of an I-joist. When an I-joist is used, the solid fire-resistant cladding material can be attached to, for example, the web of the I-joist.

First claim

1 . A fire-resistant building product comprising:
a wooden I-joist comprising a web, a top flange along a tip edge of the web, and a bottom flange along a bottom edge of the web; and a solid fire-resistant cladding material disposed directly on at least one side of the web and an opposing side of the web, wherein the solid fire-resistant cladding material comprises wood fiber matrix and one or more binders, wherein the binder comprises a wax emulsion or a paraffin emulsion.

2 . The fire-resistant building product of claim 1 , wherein the solid fire-resistant cladding material further comprises starch.

3 . (canceled)

4 . (canceled)

5 . The fire-resistant building product of claim 1 , wherein the solid fire-resistant cladding material is further disposed directly on a bottom side of the bottom flange.

6 . The fire-resistant building product of claim 1 , wherein the solid fire-resistant cladding material comprises 50 to 99 wt % wood fiber matrix and 1 to 10 wt % binder.

7 . The fire-resistant budding product of claim 1 , wherein a fire-retardant coating is applied to an external surface of the fire-resistant cladding material or an exposed surface of the wooden I-joist.

8 . (canceled)

9 . The fire-resistant building product of claim 1 , wherein the solid fire-resistant cladding material has a density in the range of 12 to 25 lbs/ft 3 .

10 . The fire-resistant building product of claim 1 , wherein the solid fire-resistant cladding material has a permeability greater than 20 perms.

11 . The fire-resistant budding product of claim 1 , wherein the solid fire-resistant cladding material has a drying rate greater than 60%/hour.

12 . A method of manufacturing a fire-resistant building product having at least one surface, comprising:
attaching a solid fire-resistant cladding material on a wooden I-joist comprising a web, a top flange along a top edge of the web, and a bottom flange along a bottom edge of the web a top flange, wherein the solid fire-resistant cladding material comprises a pre-formed component and the solid fire-resistant cladding material is attached directly to at least one of the surfaces of the web.

13 . The method of claim 12 , wherein the solid fire-resistant cladding material attached directly to both surfaces of the web.

14 . The method of claim 12 , wherein the method further comprises:
applying a fire-resistant coating on an exposed surface of the wooden I-joist or on external surface of the solid fire-resistant cladding material.

15 . (canceled)

16 . The method of claim 12 , wherein the solid fire-resistant cladding material comprises a first surface and a second surface opposite the first surface, and the method further comprises:
coating the first surface, the second surface, or both with a fire-resistant coating prior to attaching the solid fire-resistant cladding material on the at least one surface of the web.

17 . The method of claim 12 , wherein the method further comprises:
coating a fire-resistant coating on an exterior surface of the solid fire-resistant cladding material after attaching the solid fire-resistant cladding material on the at least one surface of the web.

18 . (canceled)

19 . (canceled)

Assignees

• Weyerhaeuser Nr Co

Inventors

• Dimakis Alkiviadis George
• Bjorkman Travis E
• Robak Glen
• Winterowd Jack G
• Parker Erik M
• Rieger Derik

Classifications

• E04B1/26

  the supporting parts consisting of wood · CPC title

• E04B1/944 Primary

  covered with fire-proofing material · CPC title