INSULATED DRYWALL CEILING ON STEEL "C" JOISTS

• US 20120151869A1
• Filed: 12/20/2010
• Published: 06/21/2012
• Est. Priority Date: 12/20/2010
• Status: Abandoned Application

• Current Assignee: United States Gypsum Company (GEBR Knauf Verwaltungsgesellschaft KG)
• Original Assignee: United States Gypsum Company (GEBR Knauf Verwaltungsgesellschaft KG)
• Inventors: Miller, Gary F.
• Application Number:
  US12/972,618
• Publication Number:
  US 20120151869A1
• Time in Patent Office: Days
• US Class Current: 52/650.1
• CPC Class Codes: E04B 1/7666 Connection of blankets or batts to the longitudinal supporting elements
• CPC Class Codes: E04B 9/245 by means of screws, bolts or clamping strips held against the underside of the supporting construction E04B9/26 takes precedence
• CPC Class Codes: E04C 2003/0473 U- or C-shaped

Abstract

A construction of elongated steel C-channel joists supporting a roof deck or floor and a drywall ceiling, fiber insulation batts disposed in cavities between the joists, the batts having a width substantially the same as the spacing between the joists and a thickness less than the depth of the joist, a series of anchoring elements spaced along the lengths of the joists in a mid-area of the webs, and steel wires suspended between anchoring elements of adjacent joists, the wires serving to support the insulation batts above a plane of the lower joist flanges, whereby an air space is maintained between the insulation batts and drywall ceiling.

Claims

1. A building construction comprising a plurality of elongated steel channel joists supporting a roof deck or floor and a drywall ceiling, the joists being of like construction and having a C-shaped cross-section with a web and flanges at opposite longitudinal edges of the web and extending perpendicularly to the web, the width of the web representing the depth of the joist, the joist being regularly spaced from and parallel to one another, the joists being oriented with their webs in a vertical plane such that upper and lower ones of said flanges are determined, the roof deck or floor being on or adjacent the upper one of said flanges and the drywall ceiling being on or adjacent the lower one of said flanges, fiber insulation batts disposed in cavities between the joists, the batts having a width substantially the same as the spacing between the joists and a thickness less than the depth of the joist, a series of anchoring elements spaced along the lengths of the joists in a mid-area of the webs, and steel wires suspended between anchoring elements of adjacent joists, the wires serving to support the insulation batts above a plane of the lower flanges, whereby an air space is maintained between the insulation batts and drywall ceiling.

2. A construction as set forth in claim 1, wherein the wires are bent at the anchoring elements to lock the wires in place.

3. A construction as set forth in claim 2, wherein the anchor elements are holes through the joist webs.

4. A construction as set forth in claim 3, wherein the length of the wires is greater than the spacing between adjacent joists and the wires are assembled through holes in adjacent joists.

5. The construction as set forth in claim 4, wherein the wires are bent at a side of a web opposite the side of the web facing the major length portion of a wire.

6. A method of increasing the fire resistance of a drywall ceiling carried on steel C-channel joists comprising disposing insulation batts in the cavities between the joists, supporting the insulation batts with a space between the batts and the drywall with wires, the wires being threaded through holes in the webs of the joists and being locked in position by bending the ends of the wires over through an angle sufficient to mechanically lock the wire in place on a respective pair of adjacent joists.