8—1
Annex8. Installationofsteelroofinthesizes10‐150
8.1Overview
MountrailsA1,B2,C3,D4,E5ontheunitforsupportoftrapezoidalroofplates(mountalsorailsY
andZonunitsofthesize30andonunitsthatarelargerthansize30longitudinallyatthecentre‐
lineoftheunits).
Placefoambands–
P–onthehorizontalrailsA1,B2,C3andD4forsupportofroofplates.
Calculateoverhangoftheroofatbothendsoftheuni tandmountroofoverhangprofile–G1on
thefirsttrapezoidalroofplate–F1beforetheroofplateismounted.
PlaceandmountroofplatesF1,F2,F3andsoon.
Rememberfoambandsonthesidelapsbetweenroofplatestopreventrainwaterfrompassing
through.
Placeroofoverhangprofile–G5attheotherendoftheunitbeforethelastroofplateismounted.
Mount
sidesandcornersontheroof.
Applysealingwhereplatesarejoinedtoensurewaterresistance‐eveninstormyweather.
8.1.1Mountrails.Unitsofsize10,15,20,and25
SqueezesealantinsufficientquantitybetweentheundersideoftherailsA1,B2,C3,D4,E5and
the
horizontaltopsideoftheunitbeforetherailsaremounted.Thismeansthattherailsarestandingon