Pacific Place
A Building Within a Building - San Francisco's Historic Pacific Union Building Gets a Facelift From the Inside Out.
An existing tightly spaced column grid on the lower floors was almost completely replaced with a new grid of widely spaced columns, while the column grid on the upper floors was untouched. At the same time, the brittle and aging building was provided with a structural system capable of resisting large earthquakes.
Structure Magazine, Fall 1998
by David Mar, S.E.
Propped Shear Walls
Combining Steel Braces and Concrete Shear Walls for Seismic Strengthening of Existing Buildings.
This structural system combines friction damping with the best aspects of steel braces and concrete shear walls to
create a high-performance lateral bracing system that is less expensive and less architecturally intrusive than
either steel braced frames or concrete shear walls acting alone. The I. Magnin Building in Oakland, CA, is one of
20 projects so far retrofitted using this system.
Modern Steel Construction, January 2001
by John Wolfe, S.E., David Mar, S.E., and Steve Tipping, S.E.
1 Market Street
Capacity Design of a Seismic Retrofit for an Historic High-Rise Building Using Practical Analytical Methods.
This paper presents an overview of analysis methodologies used for a seismic rehabilitation of One Market Street,
an historic high-rise building.
by David Mar and Leo Panian
2150 Shattuck
Performance-Based Seismic Upgrade of a 14-Story Suspended Slab Building Using State-of-the-Art Analysis and Construction Techniques.
The project consisted of a voluntary seismic upgrade of an existing fourteen-story building constructed in 1969. The gravity system of the existing structure includes a patented tension-hanger suspended floor system that is supported from the top of twin concrete
tower cores.
by David Mar and Leo Panian
Bayview Federal Bank
Bayview Federal Bank: A Low-Impact Seismic Upgrade using Fiberglass Wraps and Pin Piles.
This paper describes a voluntary seismic upgrade for an unusual fifteen story office building with floors suspended from two concrete cores.
by Brendan Beazley and David Mar
Headed Bars
Seismic Retrofit of Shear Walls with Headed Bars and Carbon Fiber Wrap
This paper describes research on the seismic retrofit of reinforced concrete shear walls that was undertaken to investigate proposed
seismic improvements for an existing building.
Journal of Structural Engineering, May 2003
by James Paterson and Denis Mitchell, M.ASCE
PT Shotcrete Shearwalls
Post-Tensioned Shotcrete Shearwalls
An innovative approach to earthquake safety and concrete construction in buildings
This paper describes the use of post-tensioned shotcrete shearwalls for the seismic renovation of a six story concrete office building.
Concrete International, October 2007
by Leo Panian, Marc Steyer, and Steven Tipping
PT Walls for Seismic Resistance
Post-Tensioned Concrete Walls For Seismic Resistance
An innovative approach to earthquake safety and concrete construction in buildings
This paper describes the conceptual background of and provides basic guidelines for the design and construction of hybrid post-tensioned cast-in-place (PT-CIP) concrete walls for seismic resistance.
PTI Journal, July 2007
by Leo Panian, Marc Steyer, and Steven Tipping
Smart Frame
A New High-Performance Seismic Technology
The authors introduce the Story Isolation System, which allows structural designers unprecedented control over a building's response to earthquakes by allowing the designer to set the period and level of damping.
9th U.S.-Japan Workshop on the Improvement of Structural Design and Construction Practices August 2000 (updated December 2002)
by David Mar and Steven Tipping
PT Concrete Walls and Frames
This case-study describes an innovative application of post-tensioned concrete construction in the new David Brower Center urban mixed-use development.
by Mark Stevenson, Leo Panian, Mike Korolyk and David Mar
Corrugated Sheet Steel Shear Walls
The objective of the research is to develop an alternative lateral bracing system
comprising corrugated sheet steel shear walls for use with light-framed cold-formed steel buildings.
Report to Charles Pankow Foundation, April 30, 2008
by Bozidar Stojadinovic and Steven Tipping
Evolving Micro-piles
Optimizing Foundation Systems for Seismic Retrofit
The case history of a seismic retrofit project in Berkeley, CA, is presented to illustrate the collaboration between designers and drilling specialist that resulted in a structurally efficient and cost effective design.
by Rob Jameson, Leo Panian, and Bill Rudolph
Sustainability through Strength
Integrating post-tensioned lateral systems and slag cement concrete for a model of environmental architecture
The new David Brower Center in downtown Berkeley will provide offices and meeting space for environmental advocacy and nonprofit groups. The project, named after one of the preeminent environmentalists of the twentieth century, incorporates many features of sustainable design in the structural, mechanical,
electrical, plumbing, and lighting systems and is expected to be LEED® Platinum certified by the U.S. Green Building Council.
March 2009 issue of Concrete International
by Mark Stevenson and Leo Panian
Profile of a Project
An article in the August/September 2009 issue of SolarPro magazine focuses on "a project with perhaps the most stringent design criteria in the US," the College of Marin's commercial solar thermal pool system, located in Kentfield, California. Design services for the project were provided by Tipping Mar, SunWater Solar, and Rumsey Engineers.
by SolarPro magazine's editors
SEAOC 2009 Excellence in Structural Engineering Awards Poster
This is the display board that accompanied Tipping Mar's entry to SEAOC's 2009 Excellence in Structural Engineering Awards. Our entry, entitled Corrugated Sheet-Steel Shear Wall Research, was selected to receive an Award of Excellence in the category of Study/Research/Guidelines by an independent jury of seven panel members representing all four regional sections of SEAOC.
by Steve Tipping and David Mar