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UNIRAC SunFrame Installation Manual

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Table of Contents - Code Compliant Installation Manual 809
i. Installer's Responsibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Part I. Procedure to Determine the Total Design Wind Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Part II. Procedure to Select Rail Span and Rail Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Part III. Installing SunFrame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Unirac welcomes input concerning the accuracy and user-friendliness of this publication. Please write to publications@unirac.com.
R
A HILTI GROUP COMPANY
Pub 15JAN01-1cc
© 2014 - 15
Unirac, Inc.
All rights reserved.

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Summary of Contents for UNIRAC SunFrame

  • Page 1 Part III. Installing SunFrame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Pub 15JAN01-1cc © 2014 - 15 Unirac, Inc. All rights reserved. Unirac welcomes input concerning the accuracy and user-friendliness of this publication. Please write to publications@unirac.com.

  • Page 2: Installer's Responsibilities

    IBC 2009, ASCE 7-05 and California Building Code 2010 (collectively referred to as “the Code”) . Unirac also provides a limited warranty on SunFrame products (page 24) . The installer is solely responsible for: •...

  • Page 3: Part I. Procedure To Determine The Total Design Wind Load

    The method described in this document is valid for flush, no λ = adjustment factor for building height and exposure category tilt, SunFrame Series applications on either roofs or walls . Flush is defined as panels parallel to the surface (or with no = Topographic Factor at mean roof height, h (ft) more than 3”...
  • Page 4 141 1 B roadway B o ulevard N E SunFrame Unirac Code-Compliant Installation Manual Albuquerqu e N M 87102-1545 USA Miles per hour (meters per second) Figure 1. Basic Wind Speeds. Adapted and applicable to ASCE 7-05. Values are nominal design 3-second gust wind speeds at 33 feet above ground for Exposure Category C.
  • Page 5 1 411 B road SunFrame Unirac Code-Compliant Installation Manual A lb u q ue rq Step 3: Determine Roof Zone (continued): Using Roof Zone Setback Length, a, determine the roof zone locations according to your roof type, gable, hip or monoslope .
  • Page 6 141 1 B roadway B o ulevard N E SunFrame Unirac Code-Compliant Installation Manual Albuquerqu e N M 87102-1545 USA Table 2. p Roof and Wall (psf) net30 Basic Wind Speed, V (mph) Effective Wind Area Zone (sf) Downforce Uplift...
  • Page 7 1 411 B road SunFrame Unirac Code-Compliant Installation Manual A lb u q ue rq Table 3. p Roof Overhang (psf) net30 Basic Wind Speed, V (mph) Effective Wind Area Zone (sf) -21.0 -25.9 -31.4 -37.3 -43.8 -50.8 -58.3 -74.9 -20.6...
  • Page 8 Use Table 5 below to calculate Design Wind Load . The Design Wind Load will be used in Part II to select the appropriate SunFrame Series rail, rail span and foot spacing . Table 5. Worksheet for Components and Cladding Wind Load Calculation: IBC 2009, ASCE 7-05...
  • Page 9 1 411 B road SunFrame Unirac Code-Compliant Installation Manual A lb u q ue rq Table 6. Occupancy Category Importance Factor Non-Hurricane Prone Regions and Hurricane Prone Regions Hurricane Prone Re- with Basic Wind Speed, V = gions with Basic Wind...

  • Page 10: Part Ii. Procedure To Select Rail Span And Rail Type

    4 . To use Table 8a and Table 8b the Dead Load for your specific installation must be less than 5 psf, including modules and Unirac racking systems . If the Dead Load is greater than 5 P (psf) = 0.6D + 1.0...
  • Page 11 2 appropriate values from Tables 8a and 8b . Table 8a. L-Foot SunFrame Series Rail Span (uplift and downforce) Table 8a. L-Foot SunFrame Series Rail Span (uplift and downforce) w = Distributed Load (plf)
  • Page 12 141 1 B roadway B o ulevard N E SunFrame Unirac Code-Compliant Installation Manual Albuquerqu e N M 87102-1545 USA Table 8b. L-Foot SunFrame Series Rail Span (side load) Table 8b. L-Foot SunFrame Series Rail Span (uplift and downforce) Span  = Distributed Load (plf) (ft) 10.5 11.5...
  • Page 13 1 411 B road SunFrame Unirac Code-Compliant Installation Manual A lb u q ue rq Table 9. Downforce Point Load Calculation Total Design Load (downforce) (max of case 1, 2 or 3) Step 1 Module length perpendicular to rails Rail Span...

  • Page 14: Part Iii. Installing Sunframe

    Part III. Installing SunFrame The Unirac Code-Compliant Installation Instructions supports applications for building permits for photovoltaic arrays using Unirac PV module mounting systems . This manual, SunFrame Rail Planning and Assembly, governs installations using the SunFrame systems . [3.1.] SunFrame ® rail components: Figure 4.
  • Page 15 L-foot . 4 . Rail splice — Joins rail sections into single length of rail . Flashings — Use one per standoff . Unirac offers appropri- It can form either a rigid or thermal expansion joint . 8 ate flashings for both standoff types .
  • Page 16 Footings must be lagged into structural members. Never attach them to the decking alone, which leaves both the ar- ray and roof susceptible to severe damage. • A thermal break is required every 40 feet of continuously connected rail. See Unirac Splices and Expansion Joints Installation Manual for details. •...
  • Page 17 (Fig. 8) . Ensure feet are aligned by using a chalk installation area line . (A SunFrame rail can also be used as a straight edge .) Position the L-feet with respect to the lower edge of the roof as Figure 7.
  • Page 18 A thermal break is required every 40 feet of continuously con- nected rail. See Unirac Splices and Expansion Joints Installa- tion Manual for details . 1 . Footing spacing along the rail (A in illustration above) is determined by wind loading (see pp .
  • Page 19 1 411 B road SunFrame Unirac Code-Compliant Installation Manual A lb u q ue rq 3. Laying out and installing the next row of L-feet: With L-feet only: Position the second row of L-feet in accor- dance with Figure 10 . Ensure that you measure between the lower bolt hole centers of each row of L-feet .
  • Page 20 141 1 B roadway B o ulevard N E SunFrame Unirac Code-Compliant Installation Manual Albuquerqu e N M 87102-1545 USA Material planning for rails and cap strips Preplanning material use for your particular array can prevent assemblies and cap strip assemblies need to be cut and structural or aesthetic problems, particularly those caused by spliced from 192-inch sections of rail and cap strip .
  • Page 21 . Unirac’s Slide and secure cable ties can be attached to the SunFrame rail by drilling a one by one ¼-inch hole in the rail and pushing the end of the tie into the hole .
  • Page 22 141 1 B roadway B o ulevard N E SunFrame Unirac Code-Compliant Installation Manual Albuquerqu e N M 87102-1545 USA 9. Installing the end caps: Attach the end caps to the ends of the rails by securing with the truss head sheet metal screws provided (Fig. 16) .
  • Page 23 The system fire class rating is only valid when the installation is conducted in accordance with the assembly instructions contained in this manual. Unirac’s SunFrame Universal PV Module Mounting system has been classified to the system level fire portion of UL1703.
  • Page 24 Unirac Code-Compliant Installation Manual Albuquerqu e N M 87102-1545 USA Warranty Information See http://www.unirac.com for current warranty documents and information. 14 11 Broadway B o u leva rd N E Al bu qu erqu e NM 87 102 -15 45 USA...