Florida Building Commission

Structural Technical Advisory Committee (TAC)

Monday, July 23, 2012 2:00-3:10 PM

Minutes

Department of Business and Professional Regulation

2555 Shumard Oak Blvd.—Tallahassee, Florida 32399—1.850.487.1824

Web URL: https://suncom.webex.com/suncom/j.php?ED=198496657&UID=1451815212&RT=MiMxMQ%3D%3D

 

Audio:  Dial-In Number 1.888.808.6959

Conference Code: 205 936 0213

 

Workgroup Meeting Objectives

Ø To Approve Regular Procedural Topics (Agenda and Minutes)

Ø To review and provide comments to the Commission regarding the Screen Enclosure Rule 61G20-1.002.

Ø To review and provide recommendation regarding request for Declaratory Statement(s).

Ø To Consider Public Comment

Ø To Identify Other Business

 

Committee Members

Members Present:  James Schock; Chair, Steve Strawn, Nicholas W. Nicholson, P.E., Craig Parrino, Daniel L. Lavrich, Do Y. Kim, Jaimie Gascon P.E., Harry “Rusty” Carroll

 

Meeting Agenda— Monday, July 23, 2012

All Agenda Times—Including Adjournment—Are Approximate and Subject to Change

2:00

A.)

Welcome and Opening

 

B.)

Agenda Reviewed and approved, May 31, 2012 Minutes approved as submitted

 

C.)

Staff provided the TAC a review of the Rule Development workshop to be held August 7th at the next Commission meeting regarding the proposed rule for screen enclosure.  The TAC reviewed the attached preliminary text of the proposed rule development “Alternative Design Method for Screen Enclosures” and recommended that the Commission adopts the proposed rule “Rule 61G20-1.002” as is.

THE PRELIMINARY TEXT OF THE PROPOSED RULE DEVELOPMENT IS AS FOLLWS:

61G20-1.002   Alternative Design Method for Screen Enclosures.

 

(1) The purpose of this Rule is to provide an alternate method for designing aluminum screen enclosures as defined by the Florida Building Code permitting the loads of the structural frame to be based on portions of the screen in the screen walls removed, retracted, moved to the open position or cut.  The use of framing materials other than aluminum is allowed in accordance with section 104.11 of the Florida Building Code, Building. The method applies only to walls and roofs with 100% screen. The provisions of Chapter 1 of the FBC, Building shall govern the administration and enforcement of this Rule.

 

  1. Screen enclosure frames designed in accordance with the screen removal alternates of this rule, shall be designed using signed and sealed site-specific engineering and shall be designed in accordance with the wind load provisions of the Florida Building Code, Section 1609.1.1.

 

  1. Designs that consider these screen alternates shall comply with Florida Building Code, Building, Section 2002.4 and Table 2002.4 using the 110 mph column and as modified by Table 2002.4Awith all screen panels in place.

 

  1. Designs using strength design or load and resistance factor design in accordance with the Florida Building Code, Building Section 1605.2, or allowable stress design methods of the Florida Building Code, Building, Section 1605.5.3.1 shall be permitted.

 

  1. The design shall be by rational analysis or by 3D Finite Element Analysis. Either method will be acceptable.

 

(2) Where screen enclosures are designed in accordance with the screen removal alternates of this rule, removable screen may consist of removable panels, retractable panels, or by designating specific screen panels in the design in which the screen is to be removed by cutting the screen. Removable panels shall be removed, retractable panels shall be placed in the retracted position without increasing the load on the affected area. Screen designated in the design to be cut shall be completely cut when wind speeds are forecast to exceed 75 mph.

 

(3) Where screen enclosures designed in accordance with the screen removal alternates of this rule serve as the barrier required by the Florida Building Code at Sections 424.2.17 and R4101.17.1, the required minimum height of the barrier shall be maintained when screen panels are retracted, removed, moved to the open position, or cut.

 

(4) Where screen enclosures are designed in accordance with the screen removal alternates of this rule, retractable screen panels, removable screen panels, and screen panels identified to be cut shall be clearly identified on adjacent structural members with highly visible permanent labels, at each panel, or by other means approved by the local building department.

 

(5) Where screen enclosures are designed in accordance with the screen removal alternates of this rule, the retraction of screen panels, removal of screen panels, or cutting of screen panels shall not require the use of ladders or scaffolding.

 

(6) Engineering documents submitted with building permit applications shall identify the panels to be removed, retracted, opened, or cut.

 

 

D.)

After discussion, the TAC provides the following recommendation regarding request for Declaratory Statement request DS2012-052 by Kavita A. Vallabhaneni  of the Baltimore Aircoil Company.

 Lavrich recommend using language proposed earlier by the Mechanical TAC for both Question 1 and 2 -2nd Gascon. Majority in favor.

Question 1: To the question, Does the Florida Statute 553.844(4) exempt exposed mechanical equipment, including the cooling tower structural system, from design for wind loads in accordance with the Florida Building Code?, the answer is yes, if mechanical equipment is fastened to a roof or installed on the ground in compliance with the code using rated stands, platforms, curbs, slabs, or other means it is deemed to comply with the wind resistance requirements of the 2007 Florida Building Code, as amended.

 

Question 2: To the question, Does Senate Bill 704 (Building Construction and Inspection), which was signed by Governor Rick Scott, extend the expiration of FS 553.844 until 2013?, the answer is yes, HB 704 provides for extending the expiration of an exemption from the wind resistance requirements of the Florida Building Code that are specific to enclosure of exposed mechanical equipment or appliances until the effective date of the 2013 Florida Building Code.

 

E

Asked for public comment and other business, No Further Business, No further comment

 

F.)

Adjourned at 3:10 PM

Staff Contacts: Joe Bigelow, joe.bigelow@dbpr.state.fl.us, (850) 922-9160; Mo Madani, Manager

Teleconference Process/Etiquette URL: http://www.floridabuilding.org/fbc/meetings/1_meetings.htm

 

Note: This document is available to any person requiring materials in alternate format upon request. Contact the Department of Business and Professional Regulation, 2555 Shumard Oak Boulevard, Tallahassee, Florida 32399-2100 or call 850-487-1824.