Guide Specifications



1.01 SCOPE

  1. This section includes the requirements applicable to the reroofing Adjustable Framing System to be furnished and installed under the contract. All work involved with the furnishing and installation of the reroofing adjustable framing system shall be accomplished in conformance with the requirements specified herein and with related requirements covered by other sections of this specification.


  1. Section ( ) - General Design Requirements
  2. Section 07410 - Preformed Metal Roofing
  3. Section ( ) - Attachment to existing Structure
  4. Section ( ) - Relocation of Roof Mounted Equipment & Penetrations
  5. Section ( ) - Temporary Waterproofing


  1. American Iron and Steel Construction (AISC) - Manual of Steel Construction - Allowable Stress Design, Ninth Edition.
  2. American Iron and Steel Institute (AISI)- Specifications for the Design of Cold- Formed Steel Structural Members, 1986 Edition and 1989 Addendum.
  3. Metal Building Manufacturer's Association (MBMA) Low Rise Building System Manual.
  4. American Society of Civil Engineers (ASCE) 7-95 - Minimum Design Loads for Buildings and Other Structures.
  5. Metal Roof Manufacturer's Structural Calculations, Product Information and Cautions and Erection Instructions.
  6. AWS D1.3 Structural Welding Code - Sheet Steel.
  7. AWS D1.1 Structural Welding Code - Steel.
  8. State and Local Building Codes have jurisdiction.


  1. The adjustable framing system shall provide support for the new roof system over the existing roof and shall adjust to accommodate the irregularities of the existing roof and form a uniform structural platform to support the new roof system at the specified slope.
  2. The adjustable framing system shall transfer loads from the new roof system to the existing roof structure in such a manner as to not overload the existing structural members.
  3. Design the adjustable framing system to resist the forces produced by the following loads:
    1. Wind Load:
      In accordance with
      Exposure ,
      Importance Factor = ,
      Wind Velocity =
    2. Live Load/Snow Load: psf minimum.
    3. Dead Load: Total of all permanently installed material including roofing, structural frame, accessories and all equipment that is fixed in position.
  4. Design of the adjustable framing system shall be in accordance with AISC, Allowable Stress Design Specification for Structural Steel Buildings, Ninth Edition, 1989, and AISI, Specification for the Design of Cold Formed Steel Structural Members, 1986 and 1989 addendum.


  1. Existing Conditions: Existing roof system and underlying structure on the building consists of
  2. The maximum allowable compressive load on the existing roofing material is PSI.


  1. Submit manufacturer's product data and installation instructions.
  2. Submit shop drawings showing dimensioned layout and details of adjustable framing system, dimensioned layout of existing roof and underlying structure, attachment requirements to existing structure, bracing, slopes, parts descriptions, top member height chart and a description of how the reroofing shall proceed. Shop drawings shall be sealed and signed by a Professional Engineer registered to practice in the State of
  3. Submit a complete set of adjustable framing system structural calculations prepared exclusively for this project. Structural calculations shall be sealed and signed by a Professional Engineer registered to practice in the State of
  4. Obtain approval of all submittals prior to fabrication and installation.


  1. Manufacturer: The reroof framing system manufacturer shall have been in the business as a reroof framing system manufacturer for at least five years. The manufacturer shall submit upon request at least ten projects similar in size and scope prior to commencement of work listing the architect, owner, scope, location and name of project. The manufacturer shall employ a licensed Professional Engineer qualified to design these systems as a full time employee.
  2. Product: The adjustable framing system shall have demonstrated its suitability for this application in at least one of the following manners:
    1. 1. Successful use on similar projects for a minimum of 5 years resulting in National acceptance of the product.
    2. 2. Submission of proof of appropriates load testing of the system and detailed engineering analysis.
    The suitability of item 2 relating to any specific system shall be at the discretion of the architect.
  3. Installer: The installer shall install the adjustable framing system in strict accordance with the manufacturers shop drawings and installation instructions. The installer shall have a minimum of two years experience in the installation of reroof framing systems or be specifically approved by the manufacturer.
  4. Approved Products:
    1. ReRoof America, Inc., 6717 South Yale Ave., Suite 200, Tulsa, OK write this specification with the CURA® Adjustable Reroof Framing System 74136-3327, (800) 280-2872 as the basis of acceptable performance. Like products of other manufacturer's may be approved providing they meet or exceed all of the requirements specified herein.
    2. No substitutions will be considered unless written request for approval is received in the architect's office at least fifteen days prior to date for receipt of bid. Each such request shall include the name and description of the proposed substitute, drawings, details, cuts, mock-ups, performance and test data, a list of ten projects of similar scope, references, photographs of existing installations, a letter by the manufacturer stating that the proposed substitute meets or exceeds all design criteria specified and any other information necessary for evaluation.
    3. After evaluation, approval will be issued via written addendum. No verbal approval will be given.



  1. Steel
    1. All hot rolled steel used to fabricate the adjustable frames shall have minimum yield strength of 36,000 psi. All cold-formed steel used to fabricate the adjustable frames shall have minimum yield strength of 40,000 psi. Steel shall meet requirements of an appropriate ASTM standard and shall be certifiable.
    2. The adjustable frames shall be coated with a red oxide paint or equivalent by either a spray or dip process.
  2. Fasteners
    1. Field fasteners shall be minimum 114 - 14 x 1If HWH #3 self-drilling/selftapping screws coated with a corrosion resistant coating. Screws shall be manufactured by a recognized manufacturer and shall be marked with manufacturers identification symbol.
    2. Field fasteners installed with the head under the roof panel shall be minimum #12 - 14 x I" Pancake Head #3 self-drilling/self-tapping screws coated with a corrosion resistant coating. Screws shall be manufactured by a recognized manufacturer and shall be marked with manufacturer's identification symbol.


  1. Provide adjustable framing system with open web construction consisting of steel top, bottom and web members that are sized and selected specifically for this project. Adjustable framing system shall incorporate adjustable height ranges as required by this project but in no case shall total adjustability be less than six inches. Adjustability is required to establish the proper elevation of the top member shall be achieved by an adjustable top clip, by sliding the web member vertically on the top or bottom member, by diagonal web members that rotate up and down or by field cutting any given web member to the precise length required.
  2. The top member of the adjustable framing system shall be a minimum 16 gage structural shape installed in such a manner that it's top flange lies substantially in the same plane as the new roof. The top flange of the top member shall have sufficient width to accommodate attachment of the new roof system. The top member of the adjustable framing system shall accommodate its longitudinal thermal expansion and contraction by means of a slotted connection designed to satisfy the configuration of this project, but in no case shall the top member exceed 150' in length without an expansion splice.
  3. The adjustable framing system web members shall be a structural angle or channel factory pre-cut to the exact length required to allow proper function of adjustable elements. Framing systems without adjustable elements shall have any given web member field cut the precise length required in order to establish the proper top member elevations without adjustable elements. Drawing shall clearly dimension the required overlap relationship between adjoining members to assure proper field cutting of members. Web members and any associated splices or connections shall be designed to resist any moment created by eccentric loading of the member as well as the associated axial and shear loads.
  4. Intermittent bottom members shall be factory pre-cut and the bottom flange of the bottom member shall be factory pre-punched for attachment to the existing structure. All bottom members shall be sized and selected to distribute the new roof loads to the existing structure without over stressing the bottom member or exceeding the allowable compressive strength of the roof. Calculations shall demonstrate structural suitability of the bottom member.
  5. The adjustable framing system shall be braced both laterally and longitudinally using steel strapping designed to satisfy the design loads and the roof system used. When bracing changes direction, component forces are created which must be taken into consideration in the design and erection of the framing system. The framing design shall include bracing as required to resist the following:
    1. 1. Applicable horizontal loads.
    2. 2. A minimum of2% of the vertical load applied laterally.
    3. 3. All forces developed in the plane of the roof as a result of vertical roof loads and wind loads.
  6. Shop drawings shall clearly state whether the frame was designed for fixed or floating attachment of the roof panels. If designed for floating clips, the shop drawings shall clearly state whether the system was designed for the roof panel to be fixed at the eave, the ridge, or an intermediate location.
  7. Framing design shall not rely on the roof panel or flashing to transfer in plane loads across the ridge of the roof.



  1. Verify conditions of existing roof systems and structural supports before starting installation of the adjustable framing system. Notify the architect of conditions detrimental to the successful installation before erecting the adjustable framing system.


  1. Remove existing roof-mounted equipment and modify penetrations as specified in other sections.
  2. Remove gravel, and other uneven or loose materials as required to provide a clean, even contact surface between framing system bottom member and support elements.
  3. Provide blocking and shimming as required.
  4. If required, replace deteriorated roof, insulation and roof deck as specified in other sections.


  1. General
    1. Install the adjustable framing system in accordance with manufacturer's shop drawings and installation instructions.
    2. Coordinate with installation of roofing and other adjacent work.
  2. Fasten bottom members to substrate according to manufacturer's shop drawings and installation instructions.
  3. Temporarily waterproof fastener penetrations and other penetrations through existing roof.
  4. Establish required top member elevations at the highest and lowest guide frames within a roof area. Attach web members to the bottom members at the highest and lowest guide frames. Adjust and attach top members at the required elevation to the web members at the highest and lowest guide frames. Provide temporary bracing as required. Install string lines between the highest and lowest guide frames. Ensure that string lines are tight and not sagging. Use wire and turnbuckles or other method if necessary to be certain that new roof plane is straight and true. Establish the elevation of intermediate frames according to string lines. Repeat erection sequence as required for continuity.
  5. Install permanent bracing as shown on manufacturer's shop drawings.
  6. Tolerances:
    1. Out-of-Plane: The top members of the adjustable frames shall not vary from the theoretical plane of the new roof bearing by more than ± 114 inch individually and 1 inch in 180 inches overall slope.
    2. The adjustable framing system shall be installed in a plumb and vertical position. Out of plumb tolerance shall not exceed ± 114 inch in 60".
    3. The top support beam surface of the adjustable framing system supporting the new roof shall not be out of plane with the new roof by more than 1/4" in 12"


  1. Deliver adjustable framing system in marked bundles of like sizes and configuration. Deliver top support members, bottom members and factory pre-cut web members bundled separately.
  2. Store on supports so as to maintain adjustable framing system in a dry, clean segregated condition.
  3. Handle adjustable framing system so that individual members and factory-made joints are not over stressed during shipping, storage and erection.

This guide specification is written to assist the project designer in specifying CURA® Adjustable Framing Systems by ReRoof America, Inc. The project designer is responsible for identifying any special requirements and including them in the project design, drawings and specifications. ReRoof America's engineering staff is available to assist the project designer with adapting the reroof framing system to his particular application. The project designer additionally is responsible for inspecting the existing structure to ensure its adequacy to handle the loads resulting from application of the reroof framing system and the new roof system. Please call 1-800-280-2872 for specification and design assistance. This is a copyrighted specification and is to be used only by Design Professionals for specifying CURA Adjustable Framing Systems.

©ReRoof America, Inc. 2011

ReRoof of the Year

Metal Construction News

University of Illinois - Chicago
Download Brochure