Design Solutions - Summer 2013 - (Page 6)

c e Our Mission. Inside Info For Design And Construction Professionals By Ashley Goodin AWI Technical Services Manager w ith the transition from Winter to Spring and Spring to Summer, I can almost predict an increase in technical calls by what the weather forecasters are delivering on the nightly news. It is well understood in the millwork industry that wood is a “living” hydroscopic material that is subject to move with changes in humidity associated with changes in the seasons. These changes are not design I summer 2013 unlike those experienced in other aspects of construction. I will use the example of a railroad track for comparison. My father worked for a railroad for 42 years before his retirement and with each change in the season he anticipated delays and track repair due to cracked or buckling rails. In the summer, the rails would elongate and push themselves out of alignment, forcing the maintenance crew to cut out a length to bring the rails back to the proper alignment. In the winter months, the rails would cool and contract causing the steel to break. The crew would then weld in a section of rail to fill the void, restore proper alignment, and return the track to operation. Thus was the cycle of rail maintenance – the steel was predict- able in its reaction to the environment in which it was installed and the owner was responsible to manage the maintenance appropriately and anticipate the changes that were going to occur. Wood and wood products are much the same as the steel rail from the railroad example. Movement in the form of expansion and contraction is inevitable even in the controlled interior climates of buildings. While steel reacts dimensionally to temperature change, wood reacts to a change in moisture content. Even though some materials are more “dimensionally stable,” meaning that the products or substrates are engineered to mitigate the effects of dimensional change, these wood products will still exhibit dimensional change with a change in their environment. Proper design of the final millwork installation coupled with the use of materials that are appropriate for their intended end use will certainly aid in maintaining the overall appearance and integrity of a fine woodworking project. However, project owners must be educated as to their responsibility to maintain woodwork finishes and a continued and concerted effort to maintain the environment where woodwork is installed. The Architectural Woodwork Standards, First Edition, 2009 (AWS), provides educational information as well as outlines the responsibility of woodworkers, contractors,

Table of Contents for the Digital Edition of Design Solutions - Summer 2013

Design Solutions - Summer 2013
A Global Icon
Designed for Growth
A Delicious Design
HUB of Activity
Digital Measurement: Working on A Curve
Product Showcase
AWI Manufactoring Members
Ad Index
AWI Supplier Members

Design Solutions - Summer 2013