Installation Instructions

1212EnterpriseDrive,DePere,WI54115|P:888.602.4441CorrugatedInstallation/TechnicalGuide(Updated6/17/16)
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4of9
ProjectPlanningandInstallationTips
Pitch: 
Beforeyoubuildyourstructure,youwillwanttodetermine
yourroofpitch.Beyondaesthetics,themainpurposeofaroof’s
pitchistoshedwater,snow,andotherdebrisfromtheroof. 
 Theslopeorangleofaroofisreferredtoasthepi tch. Thepitchofaroofiscalculatedbythenumberof
inchesitrisesverticallyforevery12inchesitextendshorizontally.
 Snow,wind,andweatherloadsshouldalwaysbeco nsideredwhendeterminingyourroofpitch.
 Alowroofpitchmayrequireadditionalsealingtoensureweatherresistance.
Aminimumroofpitchof2inchesforevery12inchesisrecommended. 
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Rafters:
Raftersareslopingbeamsthatmakesupthemainframeworkofaroof.Theseframingmembers
typicallyrunfromtheroofpeakdowntotheeaves.Rafterssupporttheroofload
andaretypicallycombinedwithsmallerhorizontalbeams.
 Theslopeorangleofaroofisreferredtoasthepi tch. Thepitchofaroofis
calculatedbythenumberofinchesitrisesverticallyforevery12inchesitextends
horizontally.
 Adheringtolocalbuildingcodes,spacerafterstoholduptheweightoftheroof
andtheroofload.
 Recommendedrafterspacingis24inchesapart“oncenter”.
Oncenteristhemeasurementfromthecenterofoneraftertothecenter ofthenextrafter.
Purlins:
Purlinsarethehorizontalframingmembersthatspanbetweentherafters,providingadditional
structuralsupportfortheroof.Purlinsaidinsupportingtheweightoftheroofdeck.Theroofdeckis
the“sheeting”thatcoversthesurfaceoftheroof.
 Mark,measure,andattachpurlinstotheraftersaccordingtoyourprojectdesign.
 Maximumrecommendedpurlinspanforcorrugatedsheets
is24inches.
 Inheavysnowareas,checkwithcodeauthoritiesforspecific
loadsandstresses.
Alwaysinstallpurlinsandspacethemaccordingtoyourlocal
buildingcodes!
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