Wood Redesign of the Addition to 11141 Georgia Avenue, Wheaton, Md

Open Access
Devries, Samantha Jane
Area of Honors:
Architectural Engineering
Bachelor of Architectural Engineering
Document Type:
Thesis Supervisors:
  • Thomas E Boothby, Thesis Supervisor
  • Richard George Mistrick, Honors Advisor
  • structural engineering
  • architectural engineering
  • wood
  • mid-rise building
  • structural addition
The building located at 11141 Georgia Avenue in Wheaton, Maryland was recently renovated into an apartment building. A 7-story steel-framed addition was added above the existing 7-story concrete office building. This thesis provides the methods and processes used in the analysis and redesign of the addition. Both the gravity and lateral systems are analyzed in the redesigned system. Also included is breadth work in the topics of construction management and mechanical. In order to keep the addition lightweight to minimize effects on the existing system, wood is used in the redesign. Although wood construction does not currently meet the US International Building Code for the 7-story addition, this report discusses the research regarding tall wood buildings and the use of wood as a sustainable construction material in such buildings in other countries. Furthermore, this thesis investigates whether or not a wood addition is feasible in the case of 11141 Georgia Ave with regard to structural capacity and other related topics. The floors use a panel product called Cross Laminated Timber, which spans a full bay between girders. The floor spans between glulam girders and columns. The gravity system meets design requirements for flexure, deflections, and fire performance based on the drywall encapsulation method. The lateral system includes several concrete shear walls modeled using structural analysis software (ETABS) to resist wind loading, the controlling lateral case. The information in this report demonstrates that the structural system design is a viable alternate to the existing addition. This report also includes the topics of construction management and mechanical systems. The construction breadth indicates that the redesigned system is competitive with the existing system when considering both cost and schedule. Since the wood redesign cannot have enclosed spaces, a new more aesthetically pleasing mechanical system is incorporated.