Maher Khalil Tadros
Engineers in Omaha, NE

5123777, Jun 23, 1992

May 7, 1990

7/519897

Maher K. Tadros - Omaha NE

The Board of Regents, University of Nebraska - Lincoln NE

E01C 500, E01C 300, A47L 1500

404 34

To make a reinforced concrete bridge or culvert 10, flat reinforced concrete plates 14A, 14B serving as longitudinally extending side plates and concrete folded plates 18A, 18B serving as shell-like cross members extending from side plate to side plate are formed and carried to the site. Two substantially flat side plates are mounted on drilled piers, driven piles, or other deep foundation structures at their bottom end and extend substantially vertically upward. The cross members are high moment of inertia per unit of weight, thin structures that are mounted on bottom ledges of the two substantially flat parallel vertical side walls and extend laterally between the two to support filler or other parts of the roadway between the side walls.

2011000, Jan 6, 2011

Jul 1, 2010

12/828439

Maher K. Tadros - Omaha NE, US
Kromel E. Hanna - Omaha NE, US
Quinton G. Patzlaff - Omaha NE, US

NUtech Ventures, Inc. - Lincoln NE

E02D 11/00, E02D 5/76, E02D 5/34

405232, 405252, 405256

A pile splice section for a spliced prestressed concrete pile includes a prestressed concrete element including a first end and a second end and a plurality of tendons that extend from the first end to the second end. A first end assembly at the first end of the prestressed concrete element includes a first plate coupled to the plurality of tendons. The first end assembly further includes a plurality of internally threaded fasteners embedded in the first end of the prestressed concrete element that are engagable via apertures extending through the first plate. A second end assembly at the second end of the prestressed concrete element includes a second metal plate coupled to the plurality of tendons. The second end assembly further includes a plurality of apertures extending through the second plate and accessible via pockets proximate the second end of the prestressed concrete element.

8312683, Nov 20, 2012

Sep 15, 2010

12/882305

Maher K. Tadros - Omaha NE, US
Mark D. Lafferty - Lincoln NE, US
Doug Gremel - Seward NE, US

E04C 1/00

5230911, 523097, 5230916, 52428, 527941, 527961

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.

7437858, Oct 21, 2008

Feb 3, 2004

10/770811

Henry E. Pfeiffer - Omaha NE, US
Kelvin Leslie Doerr - Omaha NE, US
Karen Ann Bexten - Omaha NE, US
Maher Khalil Tadros - Omaha NE, US

Reward Wall System, Inc. - Omaha NE

E04B 2/00

5230911, 52426, 52565

A welded wire reinforcement is used in combination with insulated concrete form blocks having opposed panels joined by form ties. A method of construction forms building structures with insulated concert form blocks. The reinforcement member has a base bar and a plurality of arms extending downwardly from the base bar and is utilized to provide increased internal strength to a modular concrete wall system. The welded wire reinforcement provides vertical and horizontal support without requiring any extra time or material to connect a vertical reinforcement to the concrete forms of the wall system. An alternate embodiment of the reinforcement member includes a horizontal base bar, arms extending downward and perpendicular from the base bar, and a plurality of end pieces attached to the arms to form a discontinuous bottom bar. The base bar and bottom bar are slidably received in rebar chairs defined by the form ties. Another embodiment of the reinforcement member is utilized for reinforcing a modular concrete wall form with a ledge.

5440845, Aug 15, 1995

Oct 6, 1994

8/320109

Maher K. Tadros - Omaha NE
David C. Salmon - Omaha NE
Todd D. Culp - Omaha NE

The Board of Regents of the University of Nebraska - Lincoln NE

E04C 226

5230912

To make precast concrete sandwich panels, a first concrete slab is formed having embedded in it one end of connectors which extend from it's surface in two directions with the path between the two containing only thermally insulative material, a layer insulative material is positioned adjacent to a central portion of said connectors to form a solid layer and a second layer of concrete is cast so as to receive the upper ends of said connectors. The connectors provide resistance to shear in at least two directions and include insulative high tensile strength members extending in more than one direction between the concrete slabs.

2013007, Mar 28, 2013

Mar 29, 2012

13/434359

George Morcous - Omaha NE, US
Maher Tadros - Omaha NE, US

E04B 5/16, E04B 1/04

52252

A precast concrete floor system that eliminates the need for column corbels and beam ledges while being very shallow. The main advantages of the present system include a span-to-depth ratio of 30, a flat soffit, economy, consistency with prevailing erection techniques, and fire and corrosion protection. The present system consists of continuous precast columns, prestressed rectangular beams, hollow-core planks, and cast-in-place composite topping. Testing results have indicated that a 12 inch deep flat soffit precast floor system has adequate capacity to carry gravity loads (including 100 psf live load) in a 30 ft×30 ft bay size. Testing has also shown that shear capacity of the ledge-less hollow-core-beam connections can be accurately predicted using the shear friction theory.

5507124, Apr 16, 1996

Sep 17, 1991

7/760996

Maher K. Tadros - Omaha NE
Jagdish C. Nijhawan - Bellevue NE

The Board of Regents of the University - Lincoln NE

F04G 2100

52251

To erect concrete structures, precast concrete beams are formed, columns having void spaces therein are erected and angle irons are temporarily mounted to said columns at beam level wherein said beams may be temporarily supported. At least one beam is positioned orthogonal to a column near the void in the column supported by the angle iron and cast-in-place concrete fills the void between the ends of said beams and said columns. In another embodiment, the columns are solid and the beams have openings of such a size as to fit around the columns so that they can be lowered to the proper beam height about the column and fastened, with the other ends of the beam being joined to adjacent beams.

2005012, Jun 9, 2005

Dec 13, 2004

11/011275

Maher Tadros - Omaha NE, US
E. Foster - Omaha NE, US
Sherif Yehia - Omaha NE, US
Audra Hansen - Elkhorn NE, US

E02D027/00

052155000, 052169900

A precast post-tensioned segmental pole system capable of supporting a load is provided. The pole system includes a plurality of pole segments that use connectors and strands to anchor them together. The strands extend within a cavity formed in the pole segments and are external to the wall structure of the pole segments. The strands may be coupled between both of the pole segments, or be anchored to a connector. The connector includes an upper piece that is coupled to one pole segment, and a lower piece that is coupled to the other pole segment. Upper and lower pieces interlock with each other to join the pole segments to one another. The strands are placed in tension so that pole system is capable of withstanding forces imposed by the load.

5671573, Sep 30, 1997

Apr 22, 1996

8/635996

Maher K. Tadros - Omaha NE
Mohsen Saleh - Omaha NE

Board of Regents, University of Nebraska-Lincoln - Lincoln NE

E04C 322, E04C 326, E04C 508

522238

A precast, prestressed concrete joist having web openings through which mechanical and electrical equipment may pass. In an exemplary embodiment, the joist comprises generally horizontal opposite top and bottom concrete members with a concrete web interposed between them. This web may have openings through which mechanical and electrical equipment may pass. Prestress steel strands may extend lengthwise through both the top and bottom members to provide prestress in the concrete joist. The concrete joist may further comprise strand restraining devices for deflecting the prestress steel strands. The precast, prestressed concrete joist having a web opening may be constructed using a reusable casting apparatus. This casting apparatus comprises a prestressing bed onto which a frame may be mounted. The frame provides a means of applying tension to the prestress steel strands and of supporting prestress strand restraining devices.