Issue: DS 2012-096 by Ronald Rowe, Chief Building
Official of City of Ocala. The request
is specific to the application and the use of polyurethane resins under an
existing dwelling for soil stabilization.
Background:
2010
Florida Building Code, Residential
CHAPTER 1 ADMINISTRATION
SECTION R101 TITLE,
SCOPE AND PURPOSE
R101.1 Title. These provisions shall be known as the Florida
Building Code, Residential, and shall be cited as such and will be referred to
herein as "this code."
R101.2 Scope. The provisions of the Florida Building Code,
Residential , shall apply to the construction, alteration, movement,
enlargement, replacement, repair, equipment, use and occupancy, location,
removal and demolition of detached one- and two-family dwellings and multiple
single-family dwellings (townhouses) not more than three stories above grade in
height with a separate means of egress and their accessory structures.
Exception: Existing buildings undergoing repair, alteration
or additions, and change of occupancy shall comply with the Florida Existing
Building Code.
R101.2.1 The
provisions of Chapter 1, Florida Building Code, Building, shall govern the
administration and enforcement of the Florida Building Code, Residential
.
R101.3 Purpose. Reserved.
R318.1 Termite Protection.
Termite protection shall be provided by registered termiticides, including soil applied pesticides, baiting
systems, and pesticides applied to wood, or other approved methods of termite
protection labeled for use as a preventative treatment to new construction. See
Section 202, REGISTERED TERMITICIDE. Upon completion of the application of the
termite protective treatment, a Certificate of Compliance shall be issued to
the building department by the licensed pest control company that contains the
following statement: “The building has received a complete treatment for the
prevention of subterranean termites. Treatment is in accordance with rules and
laws established by the Florida Department of Agriculture and Consumer
Services.”
R318.5 Foam plastic protection.
In areas where the probability of termite
infestation is “very heavy” as indicated in Figure R301.2(6), extruded and
expanded polystyrene, polyisocyanurate and other foam
plastics shall not be installed on the exterior face or under interior or
exterior foundation walls or slab foundations located below grade. The
clearance between foam plastics installed above grade and exposed earth shall
be at least 6 inches (152 mm).
Exceptions:
1. Buildings where the structural members
of walls, floors, ceilings and roofs are entirely of noncombustible materials
or pressure-preservative-treated wood.
2. When in addition to the requirements of
Section R318.1, an approved method of protecting the foam plastic and structure
from subterranean termite damage is used.
3. On the interior side of basement walls.
2010
Florida Building Code, Building
CHAPTER 1 ADMINISTRATION
SECTION 101 GENERAL
101.1 Title.
These regulations shall be known as the Florida Building Code hereinafter
referred to as "this code."
101.2 Scope.
The provisions of this code shall apply to the construction, alteration,
movement, enlargement, replacement, repair, equipment, use and occupancy,
location, maintenance, removal and demolition of every building or structure or
any appurtenances connected or attached to such buildings or structures.
Exceptions:
1. Detached one- and two-family dwellings
and multiple single-family dwellings (townhouses) not more than three stories
above grade plane in height with a separate means of egress and their accessory
structures shall comply with the Florida Building Code, Residential
.
2. Existing
buildings undergoing repair, alterations or additions and change of occupancy
shall comply with Chapter 34 of this code.
2010
Florida Building Code, Existing
101.2 Scope.
The provisions of the Florida Building Code,
Existing Building shall apply to the repair, alteration, change of occupancy,
addition and relocation of existing buildings.
101.4 Applicability.
This code shall apply to the repair, alteration,
change of occupancy, addition and relocation of all existing buildings,
regardless of occupancy, subject to the criteria of Sections 101.4.1 and
101.4.2.
101.5 Compliance methods.
The repair, alteration, change of occupancy,
addition or relocation of all existing buildings shall comply with one of the
methods listed in Sections 101.5.1 through 101.5.3 as selected by the applicant. Application of a method shall be the
sole basis for assessing the compliance of work performed under a single permit
unless otherwise approved by the code official. Sections 101.5.1 through
101.5.3 shall not be applied in combination with each other.
Exception:
Subject to the approval of the code official, alterations complying with the
laws in existence at the time the building or the affected portion of the
building was built shall be considered in compliance with the provisions of
this code unless the building is undergoing more than a limited structural
alteration as defined in Section 807.4.3. New structural members added as
part of the alteration shall comply with the Florida Building Code, Building.
Alterations of existing buildings in flood hazard areas shall comply with
Section 601.3.
101.5.1 Prescriptive compliance method.
Repairs, alterations, additions and changes of
occupancy complying with Chapter 3 of this code in buildings complying with the
Florida Fire Prevention Code shall be considered in compliance with the
provisions of this code.
101.5.2 Work area compliance method.
Repairs, alterations, additions, changes in occupancy
and relocated buildings complying with the applicable requirements of Chapters
4 through 12 of this code shall be considered in compliance with the provisions
of this code.
101.5.3 Performance compliance method.
Repairs, alterations, additions, changes in
occupancy and relocated buildings complying with Chapter 13 of this code shall
be considered in compliance with the provisions of this code.
CHAPTER
2 DEFINITIONS
ADDITION. An extension or increase in floor area, number of stories, or height of a building or structure.
ALTERATION.
Any construction or renovation to an existing structure other
than a repair or addition. Alterations are classified as Level 1, Level
2, and Level 3.
CHANGE OF OCCUPANCY.
A change in the purpose or level of activity within a building
that involves a change in application of the requirements of this code.
REPAIR. The patching, restoration and/or minor
replacement of materials, elements, components, equipment and/or fixtures for
the purposes of maintaining such materials, elements, components, equipment
and/or fixtures in good or sound condition.
CHAPTER
3 PRESCRIPTIVE COMPLIANCE METHOD
301.2 Building materials.
Building materials shall comply with the
requirements of this section.
[B] SECTION 304 REPAIRS
304.1 General.
Buildings and structures, and parts thereof, shall
be repaired in conformance with this section and with Section 301.2. Work on
nondamaged components that is necessary for the
required repair of damaged components shall be considered part of the repair
and shall not be subject to the requirements for alterations in this chapter.
Routine maintenance required by Section 301.2, ordinary repairs exempt from
permit in accordance with Section 105.2, and abatement of wear due to normal
service conditions shall not be subject to the requirements for repairs in this
section.
304.1.1 Dangerous conditions.
Regardless of the extent of structural or
nonstructural damage, the code official shall have the authority to require the
elimination of conditions deemed dangerous.
304.2 Substantial structural damage to vertical
elements of the lateral-force-resisting system.
A building that has sustained substantial structural
damage to the vertical elements of its lateral-force-resisting system shall be
evaluated and repaired in accordance with the applicable provisions of Sections
304.2.1 through 304.2.3.
304.2.1 Evaluation.
The building shall be evaluated by a registered
design professional, and the evaluation findings shall be submitted to the code
official. The evaluation shall establish whether the damaged building, if
repaired to its pre-damage state, would comply with the provisions of this code
for wind loads. Wind loads for this evaluation shall be those prescribed in
Section 1609 of the Florida Building Code, Building.
304.2.2 Extent of repair for compliant buildings.
If the evaluation establishes compliance
of the pre-damage building in accordance with Section 304.2.1, then repairs
shall be permitted that restore the building to its pre-damage state using
materials and strengths that existed prior to the damage.
304.2.3 Extent of repair for noncompliant buildings.
If the evaluation does not establish compliance of
the pre-damage building in accordance with Section 304.2.1, then the building
shall be rehabilitated to comply with applicable provisions of the Florida
Building Code, Building for load combinations, including wind. The wind loads
for the repair shall be as required by the building code in effect at the time
of original construction, unless the damage was caused by wind, in which case
the wind loads shall be as required by the building code in effect at the time
of original construction or as required by the Florida Building Code, Building,
whichever are greater. New structural members and connections required by this
rehabilitation design shall comply with the detailing provisions of the Florida
Building Code, Building for new buildings of similar structure, purpose and
location.
304.3 Substantial structural damage to gravity
load-carrying components.
Gravity load-carrying components that have sustained
substantial structural damage shall be rehabilitated to comply with the
applicable provisions of the Florida Building Code, Building for dead and live
loads. Existing gravity load-carrying structural elements shall be permitted to
be designed for live loads approved prior to the damage. Nondamaged
gravity load-carrying components that receive dead or live loads from
rehabilitated components shall also be rehabilitated or shown to have the
capacity to carry the design loads of the rehabilitation design. New structural
members and connections required by this rehabilitation design shall comply
with the detailing provisions of the Florida Building Code, Building for new
buildings of similar structure, purpose and location.
304.3.1 Lateral force-resisting elements.
Regardless of the level of damage to vertical
elements of the lateral force-resisting system, if substantial structural
damage to gravity load-carrying components was caused primarily by wind effect,
then the building shall be evaluated in accordance with Section 304.2.1 and, if
noncompliant, rehabilitated in accordance with Section 304.2.3.
304.4 Less than substantial structural damage.
For damage less than substantial
structural damage, repairs shall be allowed that restore the building to its
pre-damage state using materials and strengths that existed prior to the
damage. New structural members and connections used for
this repair shall comply with the detailing provisions of the Florida Building
Code, Building, for new buildings of similar structure, purpose and location.
Work
Area Compliance Method:
CHAPTER
5 REPAIRS
506.2 Repairs to damaged buildings.
Repairs to damaged buildings shall comply with this
section and Section 611, Reroofing.
506.2.1 Repairs for less than substantial structural
damage.
For damage less than substantial structural damage,
the damaged elements shall be permitted to be restored to their predamage condition.
506.2.2 Repairs for substantial structural damage to
elements of the lateral-force-resisting system.
A building that has sustained substantial structural
damage to the elements of its lateral force-resisting system shall be evaluated
in accordance with Section 506.2.2.1, and either repaired in accordance with
Section 506.2.2.2 or repaired and rehabilitated in accordance with Section
506.2.2.3 depending on the results of the evaluation.
506.2.2.1 Evaluation.
The building shall be evaluated by a registered
design professional, and the evaluation findings shall be submitted to the code
official. The evaluation shall establish whether the damaged building, if
repaired to its predamaged state, would comply with
the provisions of the codes that were in effect when the building was
permitted.
506.2.2.2 Extent of repair for compliant buildings.
If the evaluation establishes that the building in
its predamage condition complies with the provisions
of Section 506.2.2.1, then the damaged elements shall be permitted to be
restored to their predamage condition.
506.2.2.3 Extent of repair for noncompliant buildings.
If the evaluation does not establish that the
building in its predamage condition complies with the
provisions of Section 506.2.2.1, then the building shall be rehabilitated to
comply with the provisions of this section. The wind load for the repair and
rehabilitation shall be those required by the building code in effect at the
time of original construction, unless the damage was caused by wind, in which
case the wind loads shall be in accordance with the Florida Building Code,
Building.
506.2.3 Substantial structural damage to gravity
load-carrying components.
Gravity load-carrying components that have sustained
substantial structural damage shall be rehabilitated to comply with the
applicable provisions for dead and live loads in the Florida Building Code,
Building. Undamaged gravity load-carrying components that receive dead or live
loads from rehabilitated components shall also be rehabilitated if required to
comply with the design loads of the rehabilitation design.
506.2.3.1 Lateral force-resisting elements.
Regardless of the level of damage to elements of the
lateral force-resisting system, if substantial structural damage to
load-carrying components was caused primarily by wind effects, then the
building shall be evaluated in accordance with Section 506.2.2.1 and, if
noncompliant, rehabilitated in accordance with Section 506.2.2.3.
Staff
recommendation:
RE: Project #1)
In the scope of the work plan review for permitting the process of stabilizing
an interior concrete slab, on grade, for a 2000 sq. ft. existing dwelling unit
that was built in 2001, the application consists of injecting pressurized
structural polyurethane resin through the slab, on grade, by using core drilled
holes in which the polyurethane resin expands to lift/stabilize the concrete
slab. This process has no control of the path of flow for the polyurethane
resin in which direct contact with the slab on grade concrete is possible.
Question – Does injecting this pressurized structural
polyurethane resin for soil stabilization thru the slab on grade for existing
dwellings, with possible direct contact with the concrete slab on grade,
constitute a violation of 2010 FBC-R Section 318.5?
Answer:
No. The application of Section R318.5 of
the FBC, Residential is limited in scope to new construction.
RE:
Project #2)
In the scope of the work plan review for permitting the process of
stabilizing an exterior foundation/footer for a 1450 sq. ft. existing dwelling
unit that was built in 1985, the application consists of injecting structural
polyurethane resin in the ground outside of the existing dwelling unit to
provide structural support for the foundation /footer. This process has no control of the path of
flow for the polyurethane resin in which direct contact with the
foundation/footer is possible.
Question - Does
injecting this structural polyurethane resin into the ground outside the
existing dwelling unit with possible direct contact with the foundation/footer
constitute a violation of 2010FBC-R 318.5?
Answer: No. The provisions of Section R318.5 of the
FBC, Residential do not apply to the projects in question.