US 12,234,645 B2
Apparatus for controlling yield performance of props for roofs, and methods
Christopher J. Brown, Acme, PA (US)
Assigned to Strata Products Worldwide, LLC, Sandy Springs, GA (US)
Filed by Christopher J. Brown, Acme, PA (US)
Filed on Jun. 29, 2021, as Appl. No. 17/362,919.
Application 17/362,919 is a division of application No. 16/252,058, filed on Jan. 18, 2019, granted, now 11,053,683.
Claims priority of provisional application 62/621,361, filed on Jan. 24, 2018.
Prior Publication US 2021/0372127 A1, Dec. 2, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. E04C 3/36 (2006.01); E04C 5/01 (2006.01)
CPC E04C 3/36 (2013.01) [E04C 5/01 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A prop for supporting a roof comprising: a pole that is positioned vertically relative to ground; a tensioner positioned at a top of the pole in between the pole and the roof to pretension the pole with respect to the roof to hold the pole in place; and a ring wrapped about the pole and welded together with a weld so failure of the pole under load from the roof is a function of the weld failing before any other portion of the prop fails.