Answers . 05 November 2003                     
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    NEXT WEEK

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    Quizzical Pursuit
    —The Architecture Puzzler

    Created by Dave Guadagni

    Solution to Last Week's Puzzler
    Architecture Puzzler #169

    Question

    You’re at a construction site and about to climb the builder's extension ladder to the parapet 20 feet (6.1 meters) above. You notice the base of the ladder is about 5 feet (1.5 meters) from the wall. Do you leave it there or do you ask the builder to move it out from the wall another 18 inches (46 centimeters) or so?

    Answer

    The contractor knew what he was doing when setting up this ladder. The safest angle of inclination for an extension ladder is about 75 degrees. That's about the equivalent of one foot between wall and ladder's base for every four feet of ladder height.
     


     

    Okay, got it? Now try this week's Puzzler:

    http://www.ArchitectureWeek.com/quiz.html


     

    Dave Guadagni, AIA, is an architect with Robertson/Sherwood/Architects

    Quizzical Pursuit is Copyright 2003, Dave Guadagni.

    AW

    ArchWeek Image

    Extraordinary ladder used in the demolition of St. James Hall, engraving by Sir Muirhead Bone.
    Image: www.clipart.com

     
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