Mark Douglas Lafferty
Engineers at Ali Dr, Lincoln, NE
License number
Colorado 31871
Issued Date
May 9, 1997
Renew Date
Nov 1, 2015
Expiration Date
Oct 31, 2017
Type
Professional Engineer
Address
Address
7531 Ali Dr, Lincoln, NE 68507
Professional information
Method For Constructing Precast Sandwich Panels
US Patent:
8312683, Nov 20, 2012
Filed:
Sep 15, 2010
Appl. No.:
12/882305
Inventors:
Maher K. Tadros - Omaha NE, US
Mark D. Lafferty - Lincoln NE, US
Doug Gremel - Seward NE, US
Mark D. Lafferty - Lincoln NE, US
Doug Gremel - Seward NE, US
International Classification:
E04C 1/00
US Classification:
5230911, 523097, 5230916, 52428, 527941, 527961
Abstract:
The present disclosure is directed to a concrete sandwich panel. The sandwich panel may comprise a first reinforced concrete panel; a second reinforced concrete panel; an insulating panel sandwiched between the first reinforced concrete panel and the second reinforced concrete panel; a tie comprising a generally triangle wave-shaped pattern having a period defined by peaks spaced at a regular interval and a peak-to-peak amplitude greater than the thickness of the insulating panel; wherein the insulating panel has a plurality of generally linear slots defined at the regular interval of the tie for receiving the tie such that opposing ends of the tie terminate adjacent to the insulating panel, and the plurality of generally linear slots are filled utilizing an insulating material upon insertion of the tie to reduce thermal bridging; and wherein the peaks of the tie mechanically join the first and second reinforced concrete panels to the insulating panel.