Patents Assigned to SEISMIC STRUCTURAL DESIGN ASSOCIATES
  • Retrofit designs for steel beam-to-column connections
    Patent number: 10907374
    Abstract: A method of retrofitting a pre-Northridge type steel beam-to-column connection, includes welding the web of the beam to a flange of the column and slotting the beam web in the region of the connection and near the beam flanges. Stress relief holes are made into the web of the beam and slots are cut into the web of the beam. A top backup bar is welded to the flange of the column and a bottom backup bar is removed from the flange weld to the column. The method includes back gouging the flange of the column at a position of the removed backup bar and welding a bottom flange of the beam to the flange of the column.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: February 2, 2021
    Assignee: SEISMIC STRUCTURAL DESIGN ASSOCIATES
    Inventors: Ralph M. Richard, Clayton J. Allen
  • Retrofit designs for steel beam-to-column connections
    Patent number: 10697192
    Abstract: A method of retrofitting a pre-Northridge type steel beam-to-column connection, includes welding the web of the beam to a flange of the column and slotting the beam web in the region of the connection and near the beam flanges. Stress relief holes are made into the web of the beam and slots are cut into the web of the beam. A top backup bar is welded to the flange of the column and a bottom backup bar is removed from the flange weld to the column. The method includes back gouging the flange of the column at a position of the removed backup bar and welding a bottom flange of the beam to the flange of the column.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: June 30, 2020
    Assignee: SEISMIC STRUCTURAL DESIGN ASSOCIATES
    Inventors: Ralph M. Richard, Clayton J. Allen
  • Semi-rigid connections for braced frames
    Patent number: 9353525
    Abstract: A structural framework that includes a column, a beam, a brace beam coupled at an angle to the column and the beam, and a gusset plate to connect the brace beam with the column and the beam. The framework also includes a shear plate with horizontally slotted holes to couple to the column to the beam. The structural framework may also include double framing angles or a flex plate coupled to the gusset plate and to the beam via spacer plates to provide for a semi-rigid connection.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: May 31, 2016
    Assignee: SEISMIC STRUCTURAL DESIGN ASSOCIATES, INC.
    Inventors: Ralph M. Richard, James E. Partridge, Clayton J. Allen, Rudolph E. Radau
  • BRACED FRAME FORCE DISTRIBUTION CONNECTION
    Publication number: 20140020311
    Abstract: A structural framework that includes a column, a beam, a brace beam coupled at an angle to the column and the beam, and a gusset plate to connect the brace beam with the column and the beam. The framework also includes a shear plate with horizontally slotted holes to couple to the column to the beam. The structural framework may also include double framing angles or a flex plate coupled to the gusset plate and to the beam via spacer plates to provide for a semi-rigid connection.
    Type: Application
    Filed: February 5, 2013
    Publication date: January 23, 2014
    Applicant: SEISMIC STRUCTURAL DESIGN ASSOCIATES, INC.
    Inventors: Ralph M. RICHARD, James E. Partridge, Clayton J. ALLEN, Rudolph E. RADAU