Sheet Metal Web Stiffener And Chord Nailing Restrictor For Wooden I-Joist

Abstract

A monolithic sheet metal chord nailing restricting and web stiffening device features a chord plate combined with a web stiffening structure configured for lateral attachment to the web of a wooden I-joist. The chord plate is positioned on the bottom of the web stiffening structure and features a nail restricting hole having a diameter that corresponds to a predetermined diameter of a chord nail as defined by wooden I-joist manufacturers. The web stiffening structure has a web plate for attachment to the web and a buckling opposing web stiffening rib. Once the web stiffening structure is attached to the web above the bearing rest the nail restricting hole restricts chord nailing position and nail shaft diameter to manufacturer defined limits. Two devices may be combined by a web front bridge plate for simultaneous attachment of two opposite devices along an I-joist end.

Description

FIELD OF INVENTION [0001] The present invention relates to a chord nailing restricting web stiffener for a predetermined nailing restriction to a wooden I-joist chord at an I-joist bearing rest attachment location with simultaneous buckling opposing support at the I-joist bearing rest attachment location. BACKGROUND OF INVENTION [0002] In the field of architectural constructions, loads carried by wooden or wood like I-joists along their free spanning lengths are transferred onto bearing rests of relatively small areas. In addition to the small contact areas and the resulting large force concentrations, the nailing of the I-joist bottom chord introduces a splicing risk and consequently a potentially degrading factor on the load carrying capacity of the I-joist in the vicinity of the bearing rest. In response, I-joist manufacturers provide detailed nailing specifications on how to nail the I-joist's bottom chord onto the bearing rest in order to minimize the structurally degrading eff...

AI Technical Summary

Benefits of technology

[0007] An I-joist chord nailing restricting device features a chord plate monolithically combined with a sheet metal web stiffening structure configured for lateral attachment to the web of a wooden I-joist. The chord plate is positioned on the bottom of the web stiffening structure and features a nail restricting hole having a diameter that corresponds to a predetermined diameter of a chord nail as defined by wooden I-joist manufacturers. The nail restricting hole is in a web nailing clearance from a web face of the volume structure and in a chord front nailing clearance to an I-joist front flush face of the I-joist chord nailing restricting device. The web stiffening structure has a web plate for contacting a web side of the I-joist and web stiffening rib for buckling opposing stiffening of the web at the device attachment location. Once the device is attached to the web above the bearing rest such that the web face is contacting the web side, the nail restricting hole is accurately positioned between the web and the bottom chord side in accordance with well known requirements for web nailing clearance and chord edge nailing clearance defined by the wooden I-joist manufacturers.

[0010] Around the nail restricting hole may be a centering funnel for an easy centering of a suitable nail or the nail gun at the nail restricting hole. For increased strength at the bottom of the device and around the chord nailing access cavity, the chord plate may be angularly combined with a web plate that is parallel to and recessed from the web face. The chord nailing access cavity may also be open to a side lateral to the web face such that the nail restricting hole is additionally accessible along the I-joist front flush face.

Problems solved by technology

In addition to the small contact areas and the resulting large force concentrations, the nailing of the I-joist bottom chord introduces a splicing risk and consequently a potentially degrading factor on the load carrying capacity of the I-joist in the vicinity of the bearing rest.

The resulting high mechanical strength of the chord materials provides for small chord cross sections with an unfavorable side effect of increased splicing tendency compared to bulk lumber material otherwise used in architectural constructions.

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