Table of Contents(Page UD-25)

UItra-Dek® GENERAL INFORMATION

PREPARATORY REQUIREMENTS

1. A single pitch eave strut must be used with the Ultra-Dek® roof system.
2. Make sure a rake angle or an alternate structural flat surface has been installed on top of the purlins to accept the "Rake Support."
3. The walls do not have to be erected before the roof is installed. However, for the purpose of this manual, we have assumed that the wall panels have been installed.
4. All primary and secondary framing must be erected, plumbed and squared with bolts tightened according to accepted building practices.
5. The substructure (eave to ridge) must be on plane with a tolerance of 1/4" in 20' and 3/8" in 40'.
6. Ultra-Dek® can be erected on various types of construction. However, for the purpose of this manual, we have assumed that the roof will be installed on a new, pre-engineered metal building.
7. UItra-Dek® roof panels can be furnished in 24', 18’, and 12’ widths. However, for the purpose of this manual, we have assumed that the roof panels will be 24’ wide.
8. It is critical that the purlins or joists at the ridge and endlaps be exactly located as detailed and that they are straight from rafter to rafter. Any mislocation or bowing of these members can cause the fasteners at the endlaps or outside closures to foul as the panels expand and contract.
9. Peak purlin spacing 12’ (from the centerline of the building) or 16’ for a 9’ continuous vent.
10. For the purpose of this manual, we have assumed that this is a standard roof. If your roof is to be UL 90 rated, see special UL 90 requirements on page UD-4.
11. Read recommended erection practices on pages UD-48 and UD-49 before proceeding with roof installation.
12. ASBC recommends the use of a screw gun with a speed range of 0 - 2000 RPM to properly install all fasteners referenced in this manual. Tools rated to 4000 RPM should never be used for self drilling fasteners typically applied with metal building components.