Table of Contents(Page DL-25)

Double-Lok® GENERAL INFORMATION
PREPARATORY REQUIREMENTS

  1. A single pitch eave strut must be used with the Double-Lok® 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 (1/4" in 20' or 3/8" in 40' tolerance).
  6. DoubIe-Lok® 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. Double-Lok® 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 - 24" (12" from the centerline of the building).
  10. If your roof is to be UL 90 rated, see special UL 90 requirements on page DL-4.
  11. Read recommended erection practices on pages DL-52 and DL-53 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.

NOTE

It is the responsibility of the erector to install this roof using safe construction practices that are in compliance with OSHA regulations. ASBC is not responsible for the performance of this roof system if it is not installed in accordance with the instructions shown in this manual. Deviations from these instructions and details must be approved in writing by ASBC.

CAUTION

Diaphragm capabilities and purlin stability are not provided by ASBC’s Double-Lok® roof system.
Therefore, other bracing may be required.

CAUTION

The minimum recommended slope for the roof system is 1/4 on 12.
A slope of less than ¼ on 12 could cause severe ponding and will void material warranties.

CAUTION

Application and design details are for illustration purposes only, and may not be appropriate for all environmental conditions or building designs. Projects should be engineered to conform to applicable building codes, regulations, and accepted industry practices.

WARNING: Light transmitting panels are not designed or intended to bear the weight of any person walking, stepping, standing or resting on them. ASBC DISCLAIMS ANY WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, that any person can safely walk, step, stand or rest on or near these light transmitting panels or that they comply with any OSHA regulation.

Back   Next