FLORIDA BUILDING COMMISSION

REPORT TO THE FLORIDA BUILDING COMMISSION

December 8, 2008

Tampa, Florida

Opening and Meeting Attendance

The meeting started at 9:00 AM, and it was determined that a quorum of Hurricane Research advisory Committee members were present.

Following were the HRAC members present:

Joe Crum, Do Kim, Jack Glenn, Dave Olmstead, Craig Parrino, and Tim Reinhold.

DCA Staff Present

Rick Dixon and Mo Madani.

Meeting Facilitation

The meeting was facilitated by Jeff Blair from the Florida Conflict Resolution Consortium at Florida State University. Information at: http://consensus.fsu.edu/

Project Webpage

Information on the project, including agenda packets, meeting reports, and related documents may be found in downloadable formats at the project webpage below:

http://consensus.fsu.edu/FBC/hrac.html

Meeting Objectives

Ø To Hear a Presentation by ARA on Load Side—Wind Pressure Research

Ø To Hear a Presentation by ARA on 2008 Loss Costs Relativity Study Conducted for Florida

Office of Insurance Regulation

Ø To Hear a Presentation on Proposed ASCE 7- 2010 Design Wind Speed and Windborne Debris Criteria

Ø To Discuss Additional Research Supporting Hurricane Resistant Construction Standards Development

Review and Approve October 13, 2008 Facilitator’s Summary Report

The Workgroup voted unanimously, 6 - 0 in favor, to approve the October 13, 2008 Facilitator’s

Summary Report as presented.

Presentation by ARA on Load Side—Wind Pressure Research

Larry Vickers, ARA, presented a PowerPoint presentation on load side wind pressure research and answered member’s questions. A overview of the presentation is included as Attachment 2 of this Report.

(Attachment 2—Load Side—Wind Pressure Research)

Presentation by ARA on 2008 Loss Cost Relativity Study Conducted for Florida Office of Insurance Regulation (OIR)

Larry Twisdale, ARA, presented a PowerPoint presentation on 2008 Loss Cost Relativity Study Conducted for Florida Office of Insurance Regulation (OIR) to Committee members and answered questions. A overview of the presentation is included as Attachment 3 of this Report.

(Attachment 3—2008 Loss Cost Relativity Study)

Proposed ASCE 7- 2010 Design Wind Speed and Windborne Debris Criteria

Larry Vickers, ARA, presented a PowerPoint presentation on ASCE 7- 2010 Design Wind Speed and Windborne Debris Criteria and answered member’s questions. A overview of the presentation is included as Attachment 4 of this Report.

(Attachment 4— ASCE 7- 2010 Design Wind Speed)

Wind-Borne Debris (WBD)/Terrain Modeling

Larry Twisdale and Peter Vickery, ARA, presented a PowerPoint presentation on wind-borne debris terrain modeling and answered member’s questions. The research was funded by FBC and is a follow-up to WBD research studies. A overview of the presentation is included as Attachment 5 of this Report.

(Attachment 5— WBD Modeling)

Discussion on Additional Research Supporting Hurricane Resistant Construction Standards Development

DCA has funding to continue UF contract to continue research projects: shutters impacta, mulled windows, roofing.

(Attachment 1—Research Topics Status)

Next Steps

The HRAC will meet at the

Adjourn

The HRAC adjourned at 12:00 PM.

ATTACHMENT 1

HRAC RESEARCH TOPIC STATUS

Recommendation

Actions

Targeted

Code

Change

Action Plan

and

Assignment

A bond break be provided between primary drainage planes and stucco renderings in drained assemblies. In simple terms this will require two layers of building paper or a layer of building paper over a plastic housewrap.

HRAC recommended Expedited Amendment

Commission approved Expedited

Expedited Amendments

11/1/05

Completed

The specification, rating and testing of WRB’s be consistent with their installed exposure – i.e. tested and rated as part of a stucco assembly. Appropriate performance specifications need to be developed for WRB’s used with stucco renderings and the Florida Building Code altered to require them.

HRAC recommended Expedited Amendment

Commission approved Expedited

Expedited Amendments

11/1/05

Completed

The Florida Building Code be altered to come into compliance with the International Residential Code to explicitly allow for the construction of unvented roof assemblies.

HRAC recommended Expedited Amendment

Commission approved Expedited

Expedited Amendments

11/1/05

Completed

Require application of exterior surface coatings to ~~appropriate standard or~~ manufacturer’s specification.

HRAC recommended Expedited Amendment

Commission approved Expedited

Expedited Amendments

11/1/05

Completed

Require wood, metal or other structural support “ridge board” for tile attachment methods 1, 2 and 4A

HRAC recommended Expedited Amendment

Commission approved Expedited

Expedited Amendments

11/1/05

Completed

Recommendation

Actions

Targeted

Code

Change

Action Plan

and

Assignment

Require FBC approved pre-bagged mortar to attach hip and ridge tiles attachment methods 3 and 4B (pre-bagged mortar requirement applies to systems where mortar is the attachment component not systems utilizing ridge board and mechanical or adhesive-set)

HRAC recommended Expedited Amendment

Commission approved Expedited

Expedited Amendments

11/1/05

Completed

Require testing of ridge attachment systems according to SSTD 11 to establish wind up-lift resistance.

HRAC recommended Expedited Amendment

Commission approved Expedited

Expedited Amendments

11/1/05

Completed

Utilize an additional tile factor of 2-1 above that specified in SSTD 11 or TAS 101 to determine the “allowable overturning moment” or “attachment resistance expressed as a moment (Mf)”

HRAC recommended Expedited Amendment

Commission approved Expedited

Expedited Amendments

11/1/05

Completed

Prohibit component substitution without proper laboratory testing and FBC Product Approval

HRAC recommended Expedited Amendment

Commission approved Expedited

Expedited Amendments

11/1/05

Completed

Allow hip and ridge attachment systems with demonstrated performance equal ofr superior to that required by the identified systems

HRAC recommended Expedited Amendment

Commission approved Expedited

Expedited Amendments

11/1/05

Completed

Address requirements for installation instructions via Product Approval Workgroup Recommendations

HRAC recommended Expedited Amendment

Commission approved Expedited

Expedited Amendments

11/1/05

Completed

Recommendation

Actions

Targeted

Code

Change

Action Plan

and

Assignment

The moisture storage capacity of mass walls be increased by providing a “seat” at the base of these assemblies.

HRAC recommended expedited amendment

Commission rejected

None

Referred back to FHBA

(recommendation was from FHBA water intrusion report)

Define the terms “weather resistant” and “weather protection”

HRAC recommended expedited amendment

Commission rejected

None

Referred back to Central Florida BOAF Chapter to pursue its recommendation

Delete the criteria of chapter 14 that deems walls constructed according to the masonry chapter and concrete chapter requirements to be weather resistant.

HRAC recommended expedited amendment

Commission rejected

None

Referred back to Central Florida BOAF Chapter to pursue its recommendation

Require compliance with ANSI/SPRI ES-1 for edge flashings and copings.

HRAC recommended expedited amendment

Commission deferred to glitch amendments

Glitch Amendments 12/23/06

Completed

Require compliance with ASTM E-1592 for testing the uplift resistance of metal panel roof systems. (Note: Require ASTM E-1592 for structural metal panel roof systems and UL 580 for non-structural metal panel roof systems)

HRAC recommended expedited amendment

Commission deferred to glitch amendments

Glitch Amendments 12/23/06

Completed

Require asphalt shingles to comply with UL 2390 testing and rating based on wind speed categories

HRAC recommended expedited amendment

Commission deferred to glitch amendments

Glitch Amendments 12/23/06

Completed

Recommendation

Actions

Targeted

Code

Change

Action Plan

and

Assignment

Require removal of existing roof covering down to the deck and replacement of deteriorated sheathing in areas where basic wind speed is 110 mph or greater. If existing sheathing attachment does not comply with loads derived from Chapter 16, require installation of additional fasteners to meet the loads.

HRAC recommended expedited amendment

Commission deferred to glitch amendments

Glitch Amendments 12/23/06

Completed

Make the requirements of 2001 FBC Section 1522 (Rooftop Mounted Equipment) applicable throughout the state for all wind speeds. Include in Mechanical Volume also.

HRAC recommended expedited amendment

Commission deferred to glitch amendments

Glitch Amendments 12/23/06

Completed

Add criteria regarding wind and wind driven rain resistance of ridge vents. Attachment criteria require development but TAS 100A could be referenced for rain resistance.

HRAC recommended adoption in post “expedited” amendment

Deferred to further research

Criteria for wind resistance of soffits should be developed and added.

HRAC recommended adoption in post “expedited” amendment

Glitch Amendments 12/23/06

Completed

Further research also

Criteria for wind-driven rain resistance of soffits should be developed and added.

HRAC recommended adoption in post “expedited” amendment

Long range – post 2007 FBC update.

Conduct R&D to establish criteria.

Budget authority requested for 2007-08

Water managed window and door installation requirements be developed and the Florida Building Code altered to require them.

HRAC recommended adoption in post “expedited” amendment

2007 FBC Update 10/1/08

Prescriptive default criteria developed by 3 national window groups and submitted for 2007 FBC Update

Recommendation	Actions	Targeted Code Change	Action Plan and Assignment
Windows and doors be correctly rated and tested according to ANSI/AAMA 101. Mulled window units, double windows or composite windows be tested and held to the same requirements as single units.	HRAC recommended adoption in post “expedited” amendment	Glitch	Completed
Water managed window and door installation requirements be developed and the Florida Building Code altered to require them.	HRAC recommended adoption in post “expedited” amendment	2007 FBC Update 10/1/08	Prescriptive default criteria developed by 3 national window groups and submitted for 2007 FBC Update. Not adopted for 2007 FBC
Water managed details for dryer vents, electrical panel boxes, electrical boxes, vent fan hoods be developed and the Florida Building Code Altered to require them.	HRAC recommended adoption in post “expedited” amendment	Long range – post 2007 FBC update.	Conduct R&D to establish criteria. FY 07-08 project.
Remove the partially enclosed design option at the next code cycle.	HRAC recommended adoption in post “expedited” amendment	Special FBC amendment 1/1/07	Automatically enacted by adoption of 2006 IRC as required by 2005 SB 442. Implemented early-Jan 2007 via HB 1-A
Adopt ASCE 24-05 for elevation requirements and flood resistant materials, equipment.	HRAC recommended adoption in post “expedited” amendment	Out of Commission’s jurisdiction	FEMA and Florida DCA coordination. Special project for 2010 FBC.
Re-evaluate the hazard identification/mapping approaches in Coastal A/V Zones.	HRAC recommended adoption in post “expedited” amendment	Out of Commission’s jurisdiction	FEMA and Florida DCA coordination. Prepare and submit amendment.

For hurricane shelters and EHPA, adopt wind speed recommended by Florida DCA in the State Emergency Shelter Program and the ASCE 7-02/2001 FBC wind speed map design wind speed plus 40 mph using Performance Criteria 3.	HRAC recommended adoption in post “expedited” amendment	Out of Commission’s jurisdiction	Florida DCA, DOE and School Board Association negotiation. Not adopted for 2007 FBC

Recommendation	Actions	Targeted Code Change	Action Plan and Assignment
Pressure relieved/baffled soffit assemblies be developed for vented roof assemblies and the Florida Building Code altered to require them.	HRAC recommended adoption in post “expedited” amendment	Long range – post 2007 FBC update.	Conduct R&D to evaluate soffit water intrusion control methods.
It is unlikely that a practical paint specification can be developed in the short term to address micro-cracking stucco issues as the relationships among water vapor permeability, mil thickness and elasticity are not known. It is recommended that these relationships be explored and that until these relationships are understood the Florida Building Code not be altered to require “elastomeric paints” on stucco renderings.	HRAC recommended adoption in post “expedited” amendment	Long range – post 2007 FBC update.	Conduct R&D on water penetration, absorption and transport through concrete and masonry wall assemblies to establish criteria for coatings or other water control measures.
Add technically-based criteria regarding blow-off resistance of aggregate on built-up and sprayed polyurethane foam roofs (Roof Coverings for Roofs with Slopes Less than 2:12).	HRAC recommended adoption in post “expedited” amendment	Long range supported by R&D	Conduct R&D to establish criteria.
Develop window water leakage test and performance criteria specific to hurricane prone regions.	HRAC recommended adoption in post “expedited” amendment	Long range supported by R&D	Conduct R&D in support of AAMA standard development. Windows Work Group/UF research project

Develop criteria that pertain to attaching lightning protection systems. Include in the Electrical Volume also.

HRAC recommended adoption in post “expedited” amendment

Long range supported by R&D

Support industry standard development activity.

Tom Smith/FEMA

Revise the Florida panhandle criteria to match ASCE 7 wind borne debris region.

HRAC recommended adoption in post “expedited” amendment

Legislature must change the law- Done

Amend FBC by 7/1/07

Completed

(Conducted Study as directed by 2005 Legislature.

Issue decided legislatively.

Code amended effective July 1, 2007.)

Note: Red text indicates recommendations for expedited amendments to FBC

Black text indicates deferral to glitch amendment proceeding decided 6/28/05

Blue text indicates deferral to glitch amendment proceeding decided 5/10/05

Purple text indicates Commission deferral of HRAC recommended expedited amendments, to the glitch amendment proceeding.

ATTACHMENT 2

LOAD SIDE—WIND PRESSURE RESEARCH

ATTACHMENT 3

LOSS COST RELATIVITY STUDY

ATTACHMENT 4

ASCE 7 – 2010 DESIGN WIND SPEED CRITERIA

ATTACHMENT 5

WBD MODELING