Structural Considerations for Building Additions

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Instructor Information: Alexander Newman, P.E., F.ASCE

Course Length: 1.5 Hours

This webinar was co-sponsored by ASCE's Structural Engineering Institute and ASCE Continuing Education

Purpose and Background

Building additions are among the most common renovation projects. In the past, structural design for the added space could have been straightforward, but today’s building codes introduce a number of serious challenges for the designer. The codes contain different requirements for the additions that are structurally separated from the original building and for those that are tied-in. A tied-in addition might trigger an upgrade of the existing building for lateral loads, and sometimes even for gravity loads. Therefore, after introducing the basic options for expanding buildings, the presentation explores the relevant code provisions for each.

A detailed examination of the main types of building additions follows. The participants learn which option provides the most cost-effective design in various circumstances and minimizes the efforts involved in strengthening existing framing and foundations. Next, the instructor outlines the most important structural challenges for common types of building additions and explains how to meet them. Practical case studies illustrate the discussion.

Learning Objectives

- Become familiar with the main options for making building additions
- Study the challenges of making building additions in various circumstances and with practical ways of meeting them
- Learn when to use structurally separate additions and when tied-in additions might be appropriate

Seminar Benefits

- Examine the building code requirements for making building additions
- Discover practical techniques for strengthening foundations and common framing at the interface of tied-in additions
- Find out how wind and seismic requirements can influence the feasibility of adding space
- Explore the practical approaches for making building additions
- Examine the real-life case studies that illustrate how the challenges of adding space have been overcome in various circumstances

Intended Audience

Structural and civil engineers, architects, and building officials seeking to broaden their knowledge of structural considerations for building additions will benefit from this webinar.

Seminar Outline

- Introduction 
- Types of additions: Structurally separate vs. tied-in 
- Code provisions for making additions 
- Main structural challenges
 
- Matching floor heights
  - Capacity of columns and common framing
  - Wind and seismic loading
  - Foundation issues
- Additions to low-rise rectangular buildings
- Additions to metal building systems
  - End-to-end
  - Side-by-side
- Adding stories
  - Above
  - Below
 
- Within