Principles of Structural Design Wood Steel and Concrete

Principles of Structural Design Wood Steel and Concrete

Buildings and other structures are classified based on the risk associated with unacceptable per-
formance of the structure, according to Table 1.1. The risk categories range from I to IV, where

category I represents buildings and other structures that pose no danger to human life in the event
of failure and category IV represents all essential facilities. Each structure is assigned the highest
applicable risk category. Assignment of more than one risk category to the same structure based on
use and loading conditions is permitted.
To safeguard public safety and welfare, towns and cities across the United States follow certain
codes for design and construction of buildings and other structures. Until recently, towns and cities
modeled their codes based on the following three regional codes, which are normally revised at
3-year intervals:
1. The Building Officials and Code Administrators National Building Code
2. The Uniform Building Code

3. The Standard Building Code

The book is appropriate for an academic program in architecture, construction management,
general engineering, and civil engineering, where the curriculum provides for a joint coursework in
wood, steel, and concrete design.
The book has four sections, expanded into 17 chapters. Section I, comprising Chapters 1
through 5, enables students to determine the various types and magnitude of loads that will be
acting on any structural element and the combination(s) of those loads that will control the design.
ASCE 7-10 has made major revisions to the provisions for wind loads. In Section I, the philosophy
of the load and resistance factor design and the unified approach to design are explained.
Wood design in Section II from Chapters 6 through 8 covers sawn lumber, glued laminated
timber, and structural composite or veneer lumber, which are finding increased application in wood
structures. The NDS 2012 has modified the format conversion factors and has also introduced some
new modification factors. First, the strength capacities in accordance with the NDS 2012 for tensile,

compression, and bending members are discussed and the basic designs of these members are per-


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