b'YOUR TOOLKIT FOR BUILDING EXCELLENCEcontinued from page: 30more frequent daily changes in temperature.10.Insulation applied directly under the roof panels elevate the actual roof panel temperature during those more intense summer days. This further increases the expansion/ contraction panel length changes in the roof panels. The net result is more movement at the panel endlaps.CommentaryRoof panel fasteners connect the roof panels to the wood framing underneath, and therefore transfer forces into and out of the roof panels of the post-frame structure. Roof panels in most post-frame structures try to help the structure carry various loads. These light-gauge roof systems have limits to their structural capacity. This is particularly true of the fastener connection between the roof panels and the wood purlins. More work is needed to understand these higher, wider, and longer post-frame structures relative to their roof panel system behavior, and to further explore potential solutions to issues that develop. Preliminary work and observations indicate that effective solutions can be developed and will vary depending on a variety of building parameters. Kenneth Guffey, PE, is general manager at Rigidply Rafters Inc., in Richland, PA, and can be reached at kenguffey@rigidply.com.This article was subjected to a peer review process conducted by the NFBA Editorial Committee, which consists of at least 10 members from engineering and academic organizations throughout the United States who are each knowledgeable about Post-Frame construction. NFBA Conference & ExpoVisit Us At Booth #LA 180 L Type 106 TLayout Station with Auto Alignment Extendable Plate LevelCat. #02180 Cat. #35712- Fastest way to square long-range - Telescoping spirit levels- Auto aligning square with a push of a button - 6-10 and 7-12 versions- Horizon beam function for setting grade - Allows for quick plumbing of tall walls FRAME BUILDER - VOL5 1 / 31'