Verifying Uplift Requirements During Roof Replacement

[jar546]

Chapter 7 of the FBC Existing (similar to IEBC) states the following:

706.8​

When a roof covering on an existing structure with a sawn lumber, wood plank or wood structural panel roof deck is removed and replaced on a building that is located in the wind-borne debris region as defined in the Florida Building Code, Building and that has an insured value of $300,000 or more or, if the building is uninsured or for which documentation of insured value is not presented, has a just valuation for the structure for purposes of ad valorem taxation of $300,000 or more:

1. (a)Roof to wall connections shall be improved as required by Section 706.8.1.
2. (b)Mandated retrofits of the roof-to-wall connection shall not be required beyond a 15 percent increase in the cost of reroofing.

Exception: Structures permitted subject to the Florida Building Code are not required to comply with this section.

706.8.1Roof-to-wall connections for structures with wood roof decks.​

Where required by Section 706.8, the intersection of roof framing with the wall below shall provide sufficient resistance to meet the uplift loads specified in Table 706.8.1 either because of existing conditions or through retrofit measures. As an alternative to an engineered design, the prescriptive retrofit solutions provided in Sections 706.8.1.1 through 706.8.1.7 shall be accepted as meeting the mandated roof-to-wall retrofit requirements.
Exceptions:

1. 1.Where it can be demonstrated (by code adoption date documentation and permit issuance date) that roof-to-wall connections and/or roof-tofoundation continuous load path requirements were required at the time of original construction.
2. 2.Roof-to-wall connections shall not be required unless evaluation and installation of connections at gable ends or all corners can be completed for 15 percent of the cost of roof replacement.

 

[Mr. Inspector]

Is there a question?

 

[jar546]

Is there a question?

Does this requirement exist outside of Florida? There are other hurricane-prone states besides Florida.

 

[steveray]

Yes...the IEBC...

[BS] 706.3.2 Roof diaphragms resisting wind loads in
high-wind regions. Where roofing materials are removed
from more than 50 percent of the roof diaphragm or
section of a building located where the ultimate design
wind speed, Vult, determined in accordance with Figure
1609.3(1) of the International Building Code, is greater
than 130 mph (58 m/s), roof diaphragms, connections of
the roof diaphragm to roof framing members, and roof-towall
connections shall be evaluated for the wind loads
specified in the International Building Code, including
wind uplift. If the diaphragms and connections in thei

 

[north star]

& ~ &

It exists in other hurricane prone states & other areas
with documented high wind conditions; such as the
mountainous areas of the Smoky Mountains & other,
"IF" the IEBC has actually been legally adopted and
enforced.

Like most other Codes, adopting is one thing, ...enforcing
is another.

& ~ &

 

[Paul Sweet]

Virginia Existing Building Code 711.2 requires:
"Buildings and structures subject to a change of occupancy where such change in the nature of occupancy results in higher wind or snow risk categories based on Table 1604.5 of the VCC shall be analyzed and shall comply with the applicable wind or snow load provisions of the VCC." (VCC = IBC with Virginia Amendments)

 

[jar546]

Like most other Codes, adopting is one thing, ...enforcing
is another.

Absolutely correct. Sort of like the debacle for R602.10 before and after legislation changes.