2018 International Residential Code – Building – Accommodate Florida Specific Need
Structural TAC 

1	RB160-16	R322.3.3, R322.3.4	Modifies text of Section R322.3.3 “Foundations”. Adds new section R322.3.4 “Concrete slabs”. Coastal high hazard areas (Zone V) and Coastal A Zones are portions of flood hazard areas along open shorelines where wave action will occur. The presence of concrete slabs can increase damage to elevated buildings, in part by shifting such that added loads or increased scour occurs on the building foundation. This proposal helps clarify what is intended by the requirement in R322.3.3.  The code change was further modified by public comment.  The public comment provides for a performance statement which would require assessment as to whether damage would result if slabs were displaced and two options. The first is prescriptive – slabs built as specified will break up when undermined by scour and erosion thus site-specific consideration of scour is not required. The second retains the requirement to consider erosion and local scour (removing the word "expected"), which is necessary for slabs to actually function as self-supporting slabs.Final

Cost Impact: Will not increase the cost of construction. The free of obstruction requirement has been enforced by communities that participate in the National Flood Insurance Program and FEMA guidance has long advised the requirement can be satisfied by requiring concrete slabs to meet the proposed specifications.
	Same as change between 2015 IRC-B and 2018 IRC-B	Flood provisions	
RCCIWG – Comment

Impactful (Explain) 

	TAC Action

X

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

X

 X

a.  b.  c.      d.  e.  f. 

Vote 10Y – 0 N

Others (Explain):	Commission Action

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

 

a.  b.  c.      d.  e.  f. 

Others (Explain):		
TAC	
Commission	

    No Action Needed	

	

	

 Overlapping provisions     	

	

	

	

	
RB161-16	R322.3.6 (New)	Adds new Section R322.3.6 “Stairways and ramps”. Coastal high hazard areas (Zone V) and Coastal A Zones are portions of flood hazard areas along open shorelines where wave action will occur. Stairways and ramp for dwellings are affected by flooding, erosion and scour and the presence of stairways and ramps can increase damage to elevated buildings. This proposal helps clarify what is intended by the requirement in R322.3.3 that the area below elevated buildings shall be free of obstructions. The code change was further modified by the Committee as follows:  In the modification, Section R322.3.6 Item 1 went from language that is wide open and vague to something that is concrete, which is very helpful in the code. The proposal adds needed clarity.
 Per comment “The purpose of this public comment is to revise and expand the guidance on stairways and ramps added by this proposal.”

Cost Impact: Will not increase the cost of construction. The requirement to avoid obstructions and to have elements below elevated buildings breakaway has been enforced by communities that participate in the NFIP, whether by enforcement of the IRC or local floodplain management regulations. FEMA guidance has long advised the requirement can be satisfied by requiring stairways and ramps to meet the proposed specifications.

	Same as change between 2015 IRC-B and 2018 IRC-B	Flood provision	
RCCIWG – Comment

Impactful (Explain) 

	TAC Action

X

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

X

 X

a.  b.  c.      d.  e.  f. 

Vote 10Y – 0 N

Others (Explain):	Commission Action

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

 

a.  b.  c.      d.  e.  f. 

Others (Explain):		
TAC	
Commission	

    No Action Needed	

	

	

 Overlapping provisions     	

	

	

	

	
RB162-16	R322.3.6 (New)	Adds text of Section R322.3.6 “Decks and porches”. Coastal high hazard areas (Zone V) and Coastal A Zones are portions of flood hazard areas along open shorelines where wave action will occur. Decks and porches attached to or adjacent to dwellings are affected by flooding, erosion and scour. The presence of decks and porches can increase damage to elevated buildings unless they are constructed in ways intended to minimize damage. This proposal clarifies how decks and porches are treated and is based on the requirements of referenced standard ASCE 24-14, Flood Resistant Design and Construction and best practices documented in several publications issued by the Federal Emergency Management Agency

Cost Impact: Will not increase the cost of construction. The elevation requirement and free of obstruction requirement have been enforced by communities that participate in the National Flood Insurance Program and FEMA guidance has long advised the requirement can be satisfied by requiring decks and porches to meet the proposed specifications.

	Same as change between 2015 IRC-B and 2018 IRC-B	Flood provision	
RCCIWG – Comment

Impactful (Explain) 

	TAC Action

X

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

X

X

 X

a.  b.  c.      d.  e.  f. 

Vote 10Y – 0 N

Others (Explain):	Commission Action

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

 

a.  b.  c.      d.  e.  f. 

Others (Explain):		
TAC	
Commission	

    No Action Needed	

	

	

 Overlapping provisions     	

	

	

	

	
RB189-16	R502.1.3, R602.1.3, R802.1.2	Modifies text of Section R502.1.3 “Structural glued laminated timbers”, R602.1.3 “Structural glued-laminated timbers”, R802.1.2 “Structural glued laminated timbers”. Adds new standards “ANSI 117-2015 Standard Specifications for Structural Glued Laminated Timber of Softwood Species” ANSI/AITC A190.1 and AITC 117 were renamed as ANSI A190.1 and ANSI 117 with the approval by ANSI. The new name for ANSI A190.1 found its way into Chapter 44 during the 2015 code cycle, but this change corrects references in code chapters.

Cost Impact: Will not increase the cost of construction.
This code change will not increase the cost of construction. It simply changes the entity responsible for the maintenance of these standards from the now defunct AITC to APA-The Engineered Wood Association.

	Same as change between 2015 IRC-B and 2018 IRC-B	No action needed

As per R301.2.1.1 of the 2017 FRC, these sections are part of those prescriptive provisions that are not applicable to Florida. 	
RCCIWG – Comment

Impactful (Explain) 

	TAC Action

X

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

X

 

a.  b.  c.      d.  e.  f. 

Vote 10Y – 0 N 

Others (Explain):	Commission Action

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

 

a.  b.  c.      d.  e.  f. 

Others (Explain):		
TAC	
Commission	

    No Action Needed	

	

	

 Overlapping provisions     	

	

	

	

	
RB195-16	R505, R505.1.1, R505.1.3, R505.2.6.2, R505.3.2, R505.3.7	Modifies text of Section R505.1.1 “Applicability limits”, R505.1.3 “Floor trusses”, R505.2.6.2 “Web hole reinforcing”, R505.3.7 “Splicing”. Modifies text of Table R505.3.2 “ALLOWABLE SPANS FOR COLD-FORMED STEEL JOISTS—SINGLE OR CONTINUOUS SPANS”. Adds new standard “AISI S240-15, North American Standard for Cold-Formed Steel Structural Framing (2015)”. This proposal is intended to update the content of the Cold-Formed Steel (CFS) light-framed construction provisions of the IRC. 

Cost Impact: Will increase the cost of construction. The proposed changes to this section will not increase the cost of construction in general. While the overwhelming majority of the prescribed members have not changed or are reduced in size, there may be conditions for which the minimum member size will increase.
	Same as change between 2015 IRC-B and 2018 IRC-B	
No action needed

As per R301.2.1.1 of the 2017 FRC, these sections are part of those prescriptive provisions that are not applicable to Florida.	
RCCIWG – Comment

Impactful (Explain) 

	TAC Action

X

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

X

 

a.  b.  c.      d.  e.  f. 

Vote 10Y – 0 N

Others (Explain):	Commission Action

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

 

a.  b.  c.      d.  e.  f. 

Others (Explain):		
TAC	
Commission	

    No Action Needed	

	

	

 Overlapping provisions     	

	

	

	

	
RB198-16	507.3.5, R507, R507.1, R507.2, R507.2.1, R507.2.2, R507.2.3, R507.2.4, R507.3, R507.3
(New), R507.3.1, R507.3.2, R507.3.3, R507.3.4, R507.4, R507.5, R507.5.1, R507.6, R507.7, R507.7.1,
R507.8, R507.8 (New), R507.8.1, R507.8.1 (New)	Revises section R507.1 “Decks”. Modifies text of Sections R507.  R507.2 “Plastic composite deck boards, stair treads, guards, or handrails”, R507.2.1 “Labeling”, R507.2.2 “Flame spread index”, R507.2.3 “Decay resistance”, R507.2.4 “Termite resistance”, R507.2.5 “Installation of plastic composites”, R507.4 “Deck posts”, R507.4.1 “Deck post to deck footing”, R507.5 “Deck Beams”, R507.5.1 “Deck post to deck beam”, R507.6 “Deck joists”, R507.6.1 “Lateral restraint at supports”, R507.6.2 “Deck joist and deck beam bearing”, R507.7 “Decking”, R507.8.1.1 “Ledger details”, R507.8.1.2 “Band joist details”, R507.8.1.3 “Ledger to band joist fastener details”, R507.8.2 “Deck lateral load connection”. Adds new Section R507.3 “Deck footings”. R507.8 “Vertical and lateral supports”, R507.8.1 “Vertical supports”.

Modifies Figure R507.3 “TYPICAL DECK POSTS TO DECK FOOTINGS” and Figure R507.5 “Typical Deck Beam Spans”, R507.5.1 “DECK BEAM TO DECK POST”, R507.6 “
TYPICAL DECK JOIST SPANS”, R507.8.1.3(2) “PLACEMENT OF LAG SCREWS AND BOLTS IN BAND JOISTS”, R507.8.1.3(1) “PLACEMENT OF LAG SCREWS AND BOLTS IN LEDGERS”, R507.8.2(2) “DECK ATTACHMENT FOR LATERAL LOADS”, R507.8.2(1) “DECK ATTACHMENT FOR LATERAL LOADS”. Modifies table R507.4 “DECK POST HEIGHT”, Table R507.5 “DECK BEAM SPAN LENGTHS”, R507.6 “DECK JOIST SPANS FOR COMMON LUMBER SPECIES”, Table R507.7 “MAXIMUM JOIST SPACING”, TABLE R507.8.1.3(1) “DECK LEDGER CONNECTION TO BAND JOIST”, R507.8.1.3(2) “PLACEMENT OF LAG SCREWS AND BOLTS IN DECK LEDGERS AND BAND JOISTS.” The entire section is reorganized without any technical changes, based on similar organization in the IRC, namely, starting at the footings and working upward.

Cost Impact: Will not increase the cost of construction. There should be no cost impact, as this is purely a non-technical code change.
	Same as change between 2015 IRC-B and 2018 IRC-B		
RCCIWG – Comment

Impactful (Explain) 

	TAC Action

X

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

X

 

X

a.  b.  c.      d.  e.  f. 

Vote 10Y – 0 N

Others (Explain):	Commission Action

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

 

a.  b.  c.      d.  e.  f. 

Others (Explain):		
TAC	
Commission	

    No Action Needed	

	

	

 Overlapping provisions     	

	

	

	

	

RB249-16	R606.1	Modifies text of Section R606.1 “General”. Adds new standard “TMS 404-16 – Standard for the Design of Architectural Cast Stone”. Added standard TMS 404-16 to R606.1.

Cost Impact: Will not increase the cost of construction. The addition of these news standards is an alternative to the existing IRC provisions based on existing industry best practices
	Same as change between 2015 IRC-B and 2018 IRC-B		
RCCIWG – Comment

Impactful (Explain) 

	TAC Action

X

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

X

 

a.  b.  c.      d.  e.  f. 

Vote 10Y – 0 N

Others (Explain):	Commission Action

Accommodate Florida Specific Need:
YES (Select Criteria)                                   NO: 

 

a.  b.  c.      d.  e.  f. 

Others (Explain):		
TAC	
Commission	

    No Action Needed	

	

	

 Overlapping provisions