The Architecture Puzzler
Created by Dave Guadagni
Solution to Last Week's Puzzler
Architecture Puzzler #468
What would you expect to be different in the construction of a beam designed to withstand a positive moment compared to a beam designed to resist a negative moment?
For a beam designed with a positive moment (simple supported beams), the reinforcing steel would be located in the bottom of the beam. For a beam designed with a negative moment (such as for overhangs and cantilevers), the steel is located near the top of the beam.
Dave Guadagni, AIA, is an architect with Robertson/Sherwood/Architects
Quizzical Pursuit is Copyright 2010, Dave Guadagni.
Workers guide a steel beam at a high-rise construction site.
Photo: National Institute for Occupational Safety and Health