PHASE III – Windborne Debris Study

 

 

 

Attachment A

 

Scope of Work

 

Background: During the course of Phase I and Phase II studies and the Florida Building Commission’s investigation of hurricane resistant standard research needs, issues were identified for consideration but not addressed due to time and resource constraints. The study outlined herein, referred to as Phase III, seeks to address the identified needs for improved understanding of hurricane damage to buildings related to wind borne debris and associated wind pressure related failures of building components and cladding. Investigations of damage related to these failure modes have focused on structural damage to buildings and related risks. Assessment of building damage by the 2004 and 2005 hurricanes redirected the focus to other significant life safety risks and property damage. This study will broaden the investigation of these issues from one region of the state to building and terrain characteristics of all regions and develop information on the causal factors and resultant damage mechanisms as conceived in the overall project plan. The project results will serve as baseline for standards and guidelines development.

 

 

Approach:  The Contractor shall subcontract with Applied Research and Associates, Inc (ARA) the nationally recognized wind research expert and developer of risk analyses and wind data for ASCE-7 (the standard used for the FBC wind map). Working with ARA, the Contractor shall conduct wind tunnel and large scale wind field simulator testing of wind borne debris, including shingle, roof tile and other building component and cladding materials, on fenestrations, doors, roof and wall systems. Testing shall evaluate the effects of wind pressures and debris impact on building component and cladding failures and the resultant building damage mechanisms including wind and rain flow and pressure. Data shall be developed in consultation with and provided to ARA for enhancement and validation of wind damage models for simulation of damages and risk associated with hurricane damage mechanisms. Data shall also be collected in coordination with ARA on damage resulting from any category 3 or higher hurricanes that may occur during the period of this contract. ARA shall update models and conduct analyses of hurricane damage risks in support of building standards development.

 

 

Intent: It is the intent of the Department that the study performed under this Agreement will provide detailed physical testing and modeling necessary to supplement the information from Phase I and Phase II of this project to improve current practice on building wind loads. The study will provide information for the basis of standards for new construction and mitigation of existing buildings and guidelines for new construction practices in coastal building zones.

 

 

Scope of Work: The Contractor shall conduct physical testing of shingle, roof tile and other building component and cladding debris impact, wind and water on glazing, doors and other component and cladding in the UF large scale wind field simulator and other debris impact test facilities using test parameters decided jointly by the Contractor and ARA, and approved by the Commission. This data will be utilized by ARA, in addition to supplemental wind tunnel studies to update its building wind, water and wind borne debris damage model and the evaluations from the Phase I and Phase II studies. Results shall be documented in interim reporting via presentations to the Florida Building Commission and/or its Hurricane Research Advisor (HRAC), and a final technical report and presentation to the Commission.

The Contractor shall:

 

 

ARA Scope of Work: 

ARA shall perform the following tasks: 

 

  1. Design and conduct wind tunnel shingle and roof tile debris transport tests. Scaled aeroelastic experiments will be conducted to determine the transport distances of railed shingles from different locations on a modeled house roof. These results will be used in the next phase as part of the model updating and windborne debris model validation
  2. Determine parameters for shingle and roof tile impact tests on glazing, doors and other building components and cladding. Analyze results of physical tests conducted by UF and develop data and algorithms to incorporate into windborne debris model.
  3. Attend meetings in support of the Commission and HRAC, as directed by the Commission. 
  4. Produce reporting on all task outcomes.
  5. Be prepared to deploy damage assessments teams as directed by the Commission to be funded by a separate initiative.

 

 

University of Florida Scope of Work:

The University of Florida shall perform the following tasks:

 

  1. Design and conduct large scale wind field tests for building components and cladding as identified in consultation with ARA and the Commission to evaluate systems failures and prototype solutions and to provide data to enhance ARA simulation models. Tests will be identified and authorized via a workplan developed jointly as indicated.
  2. Conduct physical testing of shingle and roof tile debris over a variety of conditions (speed trajectory) determined in consultation with ARA (Task 2).
  3. Attend meetings in support of the Commission and HRAC, as directed by the Commission. 
  4. Produce reporting on all task outcomes.
  5. Be prepared to deploy damage assessments teams as directed by the Commission to be funded by a separate initiative.

 

 

Additional tasks pending approval and amendment of this scope

The following additional tasks will be amended into the scope of work with an additional budget of $250K if approved by the commission.

 

  1. Identify at least three additional houses to be approved by the Commission. Perform site inspections, as needed, to develop the modeling data for the Commission. Develop models of these additional houses and perform building value analyses.  Identify at least three additional houses to be approved the by the Commission. Perform site inspections, as needed, to develop the modeling data for the Commission. Develop models of these additional houses and perform building value analyses.
  2. Develop a second subdivision model based on the Florida Building Code. The parameters of this subdivision will be proposed to the Commission prior to integration into the windborne debris simulations.
  3. Develop storm surge elevation recommendations for coastal code plus for locales approved by the Commission.

 

 

Draft Budget: Distribution subject to change

 

Institution

Task

Description (from scope)

Amount

Invoice Date

ARA

1

Design and conduct wind tunnel shingle and roof tile debris transport tests

$140,000

12/30/2007

ARA

2

Determine parameters for shingle and roof tile impact tests on glazing, doors and other building components and cladding. Analyze results of physical tests conducted by UF and develop data and algorithms to incorporate into windborne debris model

$40,000

2/30/2008

ARA

3

Attend meetings

$5,000

5/30/2008

ARA

4

Produce reports

$10,000

5/30/2008

ARA

5

Be prepared to deploy damage assessments teams as directed by the Commission to be funded by a separate initiative.

 

$10,000

3/30/2008

 

 

 

 

UF

1

Design and conduct large scale wind field tests for building components and cladding

$200,000

2/30/2008

UF

2

Conduct physical testing of shingle and roof tile debris over a variety of conditions

$50,000

12/30/2007

UF

3

Attend meetings

$5,000

6/15/2008

UF

4

Produce reports

$5,000

6/15/2008

UF

5

Be prepared to deploy damage assessments teams as directed by the Commission to be funded by a separate initiative.

 

$10,000

4/15/2008

UF 5% IDC                                                                                                                            $25,000

Total Cost for All Tasks

$500,000