2000/2003 IRC Building Code Comparison - St. Paul …stpaulcorrugating.com/pdf/IRC 2000-2003 comparison.pdf · 106.1.2 Installation Instructions, can be kept in permit file when submitted

2000/2003 IRC Building Code Comparison

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ADMINISTRATION

3 R105.2Permits will be required for fences over 6 ft in height and also for retaining walls over 4ft in height measured from bottom of footing to the top of the wall.

X See previous, 2003 adds 2 items.

4 R106.1Where special conditions exist, the building official is authorized to require additional construction documents to be prepared by a registered design professional.

X* Same note in 2003. 106.1.2 Installation Instructions, can be kept in permit file when submitted by builder.

5 R106.3.1One set of construction documents shall be kept at the site of the work and shall be open to inspection by the building official or his/her authorized representative.

X * Same note in 2003. Summary Discussion

5 R106.4

Any changes made during construction that are not in compliance with the approved construction documents shall be resubmitted for approval as an amended set of construction documents.

XSame note in 2003. Word changes from "reviewed" to "approved".

5 R108.2 Fee Schedule X Summary Discussion.

6 R109.1.2 Requires plumbing, mechanical, gas & electrical systems to be inspected prior to the framing inspection.

X Summary Discussion. No change in 2003.

6 R109.1.5.1

Where fire-resistive construction is required between dwelling units or due to location on the property, the bldg. official shall require an inspection of such construction after all lathing and/or wallboard is in place, but before joints and fasteners are taped and finished.

X No change in 2003.

Notable changes for the "2003 International Residential Code". The following list is intended to be a guide to the changes in content from the '95 CABO and the 2000 IRC to the 2003 IRC. Minor changes such as chapter and method of listing will not be considered. Only actual language changes with brief description of the affects will be included with page and section number starting on page 3 of the 2000 code. *While considerable effort has been made to ensure the accuracy of this information, the City of Norman assumes no responsibility for errors or ommissions in the information presented."

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7 R111.3 Gives bldg. official authority to disconnect utilities in cases of emergency and unauthorized use or connection.


BUILDING PLANNING

21 R301Wind speed in our area has increased from 80mph to 90mph.

X Summary Discussion (Hurricane clips).

23 R301.1.1

Elaborates that accepted engineered practice should be used in conjunction with…1.) Americal Forest and Paper Association (AF & PA) Wood Frame Const. Manual (WFCM) and 2.) American Iron & Steel Framing-Prescriptive Method for One & Two Family Dwellings (COFS/PM)

24 R301.2(1)Three new categories: Ice Shield Underlayment, Air Freezing Index. And Mean Annual Temp .

43 R301.3Story height: Engineered design required when buildings exceed allowable story height limits as permitted by Chapter 6.

44 R301.7

Table R301.7 footnotes B, and C. B.) For cantilever members L shall be taken as twice the length of the cantilever. C.) For aluminum structural members or panels used in roofs or walls of sunroom additions or patio covers not supporting edge of glass or sandwich panels, the total load deflection shall not exceed L/60. For sandwich panels used in roofs or walls of sunroom additions or patio covers, the total load deflection shall not exceed L/120.

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42 R302.1

Requires 1 hr rated exterior walls when located with a fire separation distance of less than 3 ft. Fire separation distance is measured from the property line, or imaginary property line between two bldg. on the same property. As written, "no build easements" are not considered to be a part of the fire separation distance. Eaves may not project more than 12 inches when the exterior of the bldg. has a fire separation distance of 3 feet. An eave is not permitted when the fire separation distance is less than 2 feet.

XProvide examples of application. Storage Buildings affected?

42 R302.1Is now requiring only the under side of the eave to be protected when the edge of the eave is located less than 3 ft from the property line (but no closer than 2').

X Criteria changed in 2003.

45 R302.1

Projections shall not extend to a point closer than 2' -0" from the line used to determine the fire separation distance. New Exception: Detached garage accessory to a dwelling located within 2' - 0' of a lot line may have roof eave projections not exceeding 4 inches.

Storage sheds that are small enough to not require a bldg. permit are not subject to the 1 hr rated exterior wall


43 R303.3

Requires bathrooms & water closet compartments to have their own 3 SF opening or mechanical ventilation. The practice of under cutting the door and serving the area with a single mech. fan is not an accepted practice. Ventilation of the air from the space, or spaces, must be exhausted directly to the outside. Exhaust to the attic space is not an accepted practice

X Continue current practice. No change in 2003.

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45 R303.4

Opening location (new entry) R303.4.1 Intake Openings: Mechanical and gravity outside air intake openings to be located 10' - 0' from any vents, chimneys, plumbing vents, streets, alleys, parking lots, and loading docks. Where a source of hazardous or noxious contaminent is located within 10' - 0' of an intake vent, such openings shall be a minimum 1' - 0' below the contaminent source. Toilet rooms, bathrooms and kitchen exhaust is not considered hazardous or noxious.

45 R303.4.2(New Entry) Outside exhaust openings shall be located so as not to create a nuisance. Exhaust air shall not be directed onto walkways.

45 R303.5

(New Entry) Air exhaust and intake openings that terminate outdoors shall be protected with corrosion resistant screens, louvers or grills having a minimum opening size of 1/4" and max. opening 1/2" in any dimension. Openings shall be weather protected.

45 R303.6 Stairways to be illuminated a min. 1 foot-candle measured from the center of treads or landings.

45/46 R303.8The installation of one or more portable space heaters shall not be used to archieve compliance with required permanent heating.

R304.3 Kitchen no longer has a min. room dimension

46 R305.1

Exception # 4 (New Entry): Bathrooms shall have a minimum ceiling height of 6' - 8" over the fixture and at the front 21" clearance area for tubs, toilets and lavatories and 24" in front of shower opening.

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42 R305.1

Minimum ceiling ht is being lowered from 7'6" to 7'0". The code is also allowing bathrooms to have sloped ceilings which extend down to 5'0" in ht as long as 1/2 of the bathroom area contains a ceiling ht of 7'0" or greater. Please note in bathrooms 5'0" is the absolute minimum ceiling ht since there is not a required minimum floor area.

XSame requiements in 2003 - except bathroom minimum requirements have changed.

44 R307.2 Is changing the minimum distance a water closet must be centered from a tub from 12 inches to 15 inches.


48 R308.4 #11 Glazing in walls within 60 inches horizontally of a swimming pool, spa or hot tub must be tempered glass. This will greatly effect pools installed after a house is constructed.

XSummary discussion. Changed inentirely - see new entry.

48 R308.4

(New Entry): Glazing adjacent to stairways, landings and ramps within 36" horizontally of a walking surface when the exposed surface of the glass is less than 60" above the plane of the adjacent walking surface is required to be tempered.

X Summary discussion.

48 R308.4 # 1

Glazing adjacent to stairways within 60" horizontally of the bottom tread of a stairway in any direction when the exposed surface of the glass is less than 60" above the nose of the tread.

48 R308.4

Exception to hazardous locations #4: Glazing in Section R308.4, Item 6 (within 24" of a door) in walls perpendicular to the plane of the door in a closed position or where access throught he door is to a closet or storage area 3' - 0" or less in depth.

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48 R308.4

Exceptions to hazardous areas item # 9: Safety glazing is not required where the side of a stairway landing or ramp has a guardrail or handrail, including balusters or in-fill panels, or when the plane of the glass is greater than 18" from the railing.

46 R309.1.1

Ducts in the garage that penetrate the wall separating the garage from the rest of the house must be a minimum of 26 gauge steel. Please note that no openings are permitted in the duct.


49 R309.2Garages beneath habitable rooms shall be separated from all habitable rooms above by not less than 5/8" Type X gypsum board or equivalent.

50 R309.6(New Entry): Automatic garage door openers, if provided, shall be listed in accordance with UL 325.

46 R309.4Carports that are not open on at least two sides are considered a garage and all separations required for garages apply.


50 R310.1 In all basement sleeping rooms, emergency egress and rescue openings are required. When there are no sleeping rooms in a habitable basement, at least one openable emergency egress opening is required.

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47 R310.1.2All though the minimum area of egress windows has not changed, the minimum opening height has changed from 22 inches to 24 inches.


47 R310.2.1

Houses with egress windows located in a basement must install a minimum 3' wide window well. If the height of the windowsill to grade level exceeds 44 inches, than a permanent stair (or ladder) is required within the window well.


47 R311.1The required exit of a residence may not travel through a garage. These exits must be at least 3 ft in width and be a side hinged door.

XA stair or ramp to habitable levels not having an exit.

50 R311.2.1

Required exterior exit balconies, stairs and similar exit facilities shall be positively anchored to the primary structure to resist both vertical and lateral forces. Such attachments shall not be accomplished by use of toenails or nails subject to withdrawal.

48 R312.1.2Exception changes the maximum elevation height of a landing at an exterior doorway from 8 1/4 inches to 8 inches.

XChange in 2003 - see R311.4.3 (as noted below).

50 R311.4.3

A landing is not required on each side of an ext. door if a stairway of 2 or fewer risers is located on the ext. side and the top step is not greater than 1.5 inches lower than the top of the threshold. The floor or landing at ext. door other than the exit door required by R311.4.1 is not required to comply with this requirement but must comply and not be more than 7 3/4" below the top of the door and threshold.

48 51 R314.1 Handrails may project 4 1/2 inches into the stairway instead of 3 1/2 inches.

XNo change in 2003. Exception now Section 311.5.1

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48 R314.2Maximum riser height is 7 3/4 inches from 8 1/4 inches. 3/8 inches variance between treads in unchanged. See proposed amendment.

XSummary discussion. No change in 2003 except now Section R311.5.3.1

51 R311.5.3.2 Tread depth minimum 10 inches.

51 R11.5.3

Open risers are permitted, provided that the opening between treads does not permit the passage of a 4" diameter sphere. Exception: the opening between treads is not limited on stairs with a total rise of 30" or less.

51 R311.5.4 A flight of stairs shall not have a vertical rise greater than 12' between floor levels or landings.

The width of each landing shall not be less than the stairway served and a minimum 36" deep.

48 R314.6

Circular stairs--the design requirements have changed to no longer require the inner stair radius to be twice that of the stair width. However, every stair must be the identical size.

XChanged in 2003 - see Section R11.5.8 - No separate circular stair definition.

48 R314.8Interior stairways that contain a storage area underneath must have 1/2 inch gypsum board installed on the interior walls and ceilings.

XSame code as CABO 310.3. Same code in 2003 except now Section R311.2.2.

51 R311.5.4The walking surface of treads and landings of stairways shall be sloped no steeper than one unit vertical in 48" horizontal (2 percent slope).

49 R315.1

Handrail heights must now be installed at a height between 34-38 inches on stairs with 2 or more rises. The CABO code allows a minimum height of 30 inches and requires the handrail at 3 or more risers.

X Changed in 2003 (see below).

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51 R311.5.6 Handrail required on at least one side of a stairway with 4 or more risers.

52

Handrail gripsize broken down into 2 types. Type I: Circular cross-section shall have a dia of at least 1 1/4" to not greater than 2". If not circular, it shall have a perimeter dimension of 4" and not greater than 6 1/4" with max. cross sectional area of 2 1/4 inches. Type II: Handrail with a perimeter greater than 6 1/4" shall provide a graspable finger recess area on both sides of profile - see p. 52 for dimensions.

52 R311.5.8.2Bulkhead basement stairs that are not part of required building egress, that provide access to exterior grade are exempt from min. stair requirements.

52 R312.1.2Screened-in porches and decks 30" or more above grade shall be provided with guardrails.

52 R312.2Exception to "4" sphere limitation: Openings for required guards on the sides of stair treads shall not allow a 4 3/8 sphere to pass through.

49 R316.2Required guardrails may not be constructed with horizontal rails or other ornamental pattern that results in a ladder effect

X

"Ladder effect" rule has been removed from 2003 IRC.

49 R317.1Revised section requires smoke detection systems to be installed in accordance with NFPA 72. Although detector locations are the same, NFPA 72 allows more freedom to install the security/fire alarm systems

X No change in 2003 IRC. (now Section 313).

50 R318.1.1Foam plastic insulation (including foam caulking) must have a flame spread rating of 75 or less and a smoke development rating of no more than 450

XClarify application - summary discussion. No change in 2003.

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50 R318.1.2

Foam plastic insulation (including foam caulking) may not be exposed to the interior of the building unless it is protected with a 15 minute thermal barrier such as gypsum board or fire caulk. Plumbing holes may no longer be sealed with foam insulation unless escutcheons are provided for adequate fire stops.

XClarify application - summary discussion. No change in 2003 IRC (now Section 314).

50 R318.2.3

Foam sheathing may not be exposed within attics and crawlspace areas. Sheathing in these areas must be protected with 1 1/2 inch mineral fiber insulation (not fiberglass), particle board, hardboard, paneling, or be lined on the interior side with 0.016 inch (26 gauge) corrosion resistant steel.

XClarify application - summary discussion. No change in 2003 IRC, (now Section 314).

50 R320.1Batt insulation may not be installed in attics with the kraft facing exposed.

X2003 IRC defines facings, "such as vapor retarders of vapor permeable membranes".

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51 R321.1Exception allows the 1hr fire wall between two-family dwellings to be reduced to 1/2 hour when the bldg. is sprinkled throughout.

X No change in 2003 IRC, (now Section 317).

51 R321.2.4

Structural Independence--Although not a code change, townhouse units must be constructed structurally independent of each other. Roof lines must be constructed so that adjacent living units will remain standing in case of building failure of one or more other units.

X No change in 2003 IRC.

57 R319.1.4

Wood columns do not have to be pressure treated or naturally decay resistant if they are supported by piers or metal pedestals projecting 1" above floors exposed to weather or basements or cellars and are 6" above exposed earth and are separated therefrom by an approved impervious moisture barrier. Posts or columns in enclosed crawl spaces or unexcavated w/periphery of building supported by pier or metal pedastal 8" or greater from exposed ground need not be treated or naturally decay resistant.

54 R325.1All new buildings are required to be addressed and marked in such a way as to be plainly visible and legible from the street or road fronting the property.

X No chane in 2003 IRC (now section 321).

54 R326This section refers accessibility requirements to chapter 11 of the International Building Code.

X

R322.1: 2003 IRC states: "when 4 or more dwelling units or sleeping units in a single structure the provisions for IBC for group 3 shall apply".

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FOUNDATIONS

57 R401.4Soil tests--In areas likely to have expansive soils, the building official has the prerogative to require soil testing by an approved agency

X Clarify application. No change in 2003.

62 R402.3

Precast concrete (New Entry): Approved precast concrete foundations shall be designed and installed in accordance with the provisions of this code and the manufacturer's installation instructions.

63 TABLE R 403.1Minimum width of Concrete or Masonry Footings: Minimum widths of concrete footings have been reduced in several categories.

58 R403.1.3.1Foundations with stem walls will be required to place at least one #4 reinforcing bar at the top of the wall and one bar at the bottom of the footing

X

Verify application - may not impact our seismic zone. BOCA and SBCCI have indicated this provision only applies in seismic areas D1 and D2. No change in 2003 IRC.

58 R403.1.4

All exterior footings must extend below the frost line or a minimum of 12 inches. Recent tables indicate our frost depth to be no more than 12 inches. Footings (including the beam of a pier & beam foundation) will be required to extend a minimum of 12 inches below grade unless a sealed engineer footing design indicates an alternate approach and specifically acknowledges the effects of frost in that design.

X

Discussion about application to pier and grade beam. Language format changed in 2003 IRC, but same intent. Accessory bldgs under 400 & decks not support by house are exempt.

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62 R403.1.6

Foundation anchorage of braced wall panels must be accomplished by anchor bolts or foundation anchor straps. Although "Hilt-type" powder actuated fasteners are evaluated and approved to anchor exterior and interior sill plates, their uses are limited to 100 lb/ft sheer load. In houses with particularly large spans that transfer wind loads down to the foundation, the 100 lb/ft shear loads can be exceeded.

X

Update evaluation reports. Summary discussion. 2003 IRC: A minimum 2 anchor bolts per plate section with 1 bolt no more that 12" or less than > bolt diameters from each end of the plate section.

66 R403.1.6.1

Foundatin anchorage in seismic design categories C,D, and D2--Requires anchor bolts on interior braced walls and interior bearing walls 6' 0. C. And 12" from the ends of each plate section. The maximum anchor bolt spacing shall be maximum 4' - 0" for buildings over 2 stories.

For seismic design category C this requirement is only applicable to wood light-frame townhouses.

63 R403.1.7 This is a new section that limits the location of building adjacent to slopes exceeding 1:3".


63 R403.1.7.3

This section requires the top of any foundation wall to extend above a street gutter a minimum of 12 inches plus 2%. Alternate elevations can be approved by th building official if drainage is demonstrated.

XClarify - Verify compatible with engineering standards. No change in 2003 IRC.

67 R403.3.1/403.3.2

New Entry: Attachment of wall and horizontal insulation to unheated and heated slab on ground structure requires continuity - new figure R 403.3 (3) & (4) illustrates requirements.

66 R404.1Expanded tables regarding steel reinforcement, thickness, etc or concrete wall and the amount of earth they are permitted to hold back.


72R404.4 to R404.4.11

This is a new section that addresses the use of Insulated Concrete Form foundation walls. These sections are very similar to Poly-Steel's installation requirements.

X See next entry for changes in chart.

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79 R404.1 (1-5)

ICF table footnote b. states that the table does not intend to prohibit the use of ICF manufacturers tables based on engineering analysis in accordance with ACI 318. Footnote A notes that when reinforcing steel with a min. yield strength of 60,000 psi is used, the spacing of the reinforcement in the shaded cells shall be increased 12 inches.

85 R408.3

Access to under floor space now allows a min. 16" X 24" opening through a perimeter wall, the required min. 18" X 24" opening through a floor remains the same. An areaway of 16" X 24" is required in front of any perimeter wall opening partially or completely below grade and cannot be located below a door.

87 R502.1.5New Entry: Glue laminated timbers shall be manufactured and identify as required in AITC A190.1 and ASTM D3737.

FLOORS

79 R502.3.1Floor joists in attic areas that are accessed by fixed stairs must be sized using a 30 psf live load and 10 psf dead load.

X Further discussion. No change in 2003 IRC.

79

Table R502.3.1(1), Table R502.3.1(2) and Table R502.5(1)

Contain new lumber spans for floor joists, girders and headers. They also include requirements for the number of jack studs required to support each member.

XTable 502.5 (1) now includes "girders" with headers and adds category for "roof, ceiling & two clears span floor".

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87 R502.3.3

New Entry: With span tables for floor cantilevers. Floor cantilever spans shall not exceed the nominal depth of the wood floor joist. See table R502.3.3 (1) and R 502.3.3 (2) for additional information.

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87 R502.4

Joists under bearing partitions. "Bearing partitions perpendicular to joist shall not be offset from supporting girders, walls or partitions more than the joist depth unless such joists are of sufficient size to carry the additional load.

86 R502.11.4Requirements for truss documentation that must be provided upon delivery and available to the inspector in the field.

X

86 R502.12Draftstopping will be required in the floor cavity of a 2 or more story dwelling if the floor framing members are made up of open webs or perforated members. Draftstopping must divide these areas into 1000 SF increments.

X No new changes in 2003 IRC.

87 R503.2.1 Allows Canadian standards to apply to structural panel gradings.


88 R505 This section is new to the IRC and provides requirements for light-gauge steel floor framing.

X (See below: Section R505.1.1)

98R505.1.1/Table R505.3.1 (1)

Steel framing maximum design wind load has been reduced from 130 mph down to 110 mph.

110 R506.2.3

Liquid vapor retarder material and thickness is now specified as 6 mil polyethylene (or approved vapor retarder) The vapor retarder may now be omitted from attached garages as well as detached garages.

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111 R602.1.2New Entry: Glued laminated timbers shall be manufactured and identifed as required in AITC A190.1 and ASTM D3737.

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WALL CONSTRUCTION

103 R602.2The exception supercedes table R602.3(5) which may be interpreted to allow utility grade lumber to support a floor. This is actually prohibited.


111 R602.3

Exterior walls covered with foam plastic sheathing shall be braced in accordance with Section R602.10 structural sheathing shall be fastened directly to structural framing members.

103 R602.3.1Reference to new table to be utilized where stud length exceeds 10 ft in length. Please note that if this table is used, only No. 2 grade studs or better may be used.

XSummary Discussion. Clarify what grading allowed. Format of table has changed "TYPEO" on Table ref. 602.1.3 . . .should be 602.3.1

111 R602.3.1

Exceptions to stud spacing according to Table 602.3 (5): Utility grade studs shall not be spaced more than 16" on center, and shall not extend 8' in height for ext. walls and load-bearing walls.

103 R602.3.2Code has changed to allow end joints of double top plates to over lap 24 inches instead of 48 inches

X(2003 IRC). Plates to be a minimum 2" nominal width.

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112 R602.6

Clarify that studs may be notched no more than 25% of their width when located in an exterior or load bearing wall. Studs in nonbearing walls may be notched up to 40% of their width. Any stud may be bored up to 40% of its width as long as the edge of the hole is no closer than 5/8 inch to the edge of the stud. The section allows larger bores up to 60% of the stud width if the member is doubled and even larger bores if a stud shoe is utilized


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112 R602.6.1

Allow for top plates to be bored or notch more than 50% of its width if it is reinforced by a 16 gauge strap that is a minimum of 1.5 inches wide. The strap must be fastened to the top plate by a minimum of six 16d nails on each side of the notch or bore. See figure 602.6.1

X2003 IRC require eight 16d nails at each side of the 16 gauge strap.

112 R602.8Introduces new term--"Fireblocking", formerly referred to as "firestopping" in the 1995 CABO, now used the same terminology as BOCA and the IBC


112 R602.8 #1Fireblocking is now required to be installed in stud walls at 10 ft intervals. This will require a horizontal block in all stud wall cavities that are taller than 10'.

XVerbage is different in 2003 IRC, item 1, but no code change.

112 R602.8 #6 Cornices of 2-family dwellings must also be fireblocked. X No change in 2003 IRC.

120 R602.8.1Fireblocking insulation is further defined as non-rigid materials

112 R602.8.1.1Unfaced fiberglass insulation may be used as fireblocking if installed in such a way as to be securely maintained in place.

XA minimum height of 16" vertical unfaced insulation required for fireblocking.

112R602.10 through R602.10.11.2

These sections have been modified in several areas for braced wall lines (commonly referred to as wall bracing in the 1995 CABO).

X Summary Discussion

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116 R602.10.1

Specifies that offsets may occur in braced wall lines of up to 4ft in each direction. According to interpretations given by BOCA and SBCCI, braced wall panels are permitted to begin no more than 12 ft from the end of each braced wall line (12.5 ft w/engineering). In short, this means that the "corner bracing", as we are used to calling it, can begin as far as 12'6" from the actual corner as long as the minimum amount of wall bracing meets table 602.10.3. Windows may not occur in the designated braced wall panel areas.

X Re-visit for clarification

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121 R602.10 Wall Bracing interior walls also to be required to braced like exterior walls per R602.10.1.1

121 R602.10Braced wall panels shall begin no more than 12.5 feet from each end of a braced panel. A designed "collector" shall be provided if the bracing begins more than 12 feet from each end of a braced wall line.

124 R602.10.1.1Spacing of braced wall line shall not exceed 35 ft. on center in each story. See exceptions where spacing exceeding 50' is permitted.

116 R602.10.2

If a lower story or crawl space is framed with a cripple wall, it too must be braced as if it were a typical story. However, the amount of bracing required per table R602.10.3 must be increase by 15% and the wall panel spacing must be decreased from 25ft O.C. to 18 ft O.C.

X Same as in 2003 IRC.

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117 R602.10.6

This section deals with wall bracing of short return walls (i.e. garage door openings) in which they may be reduced in length from 48 inches to 2'8" if additional anchor bolts and tie downs fastened to the foundation reinforcing steel are installed. Many of the houses that survived the May 3, 1999, tornadoes experience failure to their garage due to lack of bracing in these areas.

XSee proposed change. No change in language in 2003 IRC.

122 R603 This section is new to the IRC and applies light gauge steel framing.

X Same as in 2003 IRC.

168R606.11 to R606.11.4.2

Deals w/masonry loadbearing walls of CMU construction. XSee R606.11.3.1 (pg 160 - IRC 2003) for change item.

179 R611

This section is new and codifies the use of Insulated Form Wall construction such as Poly-Steel. A majority of the form manufacturers currently have evaluation reports issued by the various code publishers and should be unaffected by this section.

X See page 167-198 2003 IRC for extensive revisions for ICF contruction.

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203 R702.1 Interior masonry veneer walls require support and anchorage but air space is not required.

WALL COVERINGS

202R702.3.5 (Table R702.3.5, footnote d)

This section prohibits the use of 3/8 inch gypsum board on a ceiling that will support insulation or is textured with a water-based finish. When applying a water-based texture to gypsum board ceilings, the minimum thickness of the gypsum board must be 1/2 inch when framing members are on 16 inch centers and 5/8 inch when framing members are on 24 inch centers. In either case, gypsum board must be installed perpendicular to the framing members.

XSummary Discussion. See below for additional restrictions.

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204 R702.3.5 Interior gypsum board shall not be installed where it is directly exposed to weather or water

205 R702.4.2/R702.3Water resistant G.W.B shall not be installed: 1.) Over vapor retarder in a shower or tub compartment. 2.) Where exposed to water or continuous high humidity.

205R703.4 (Table R703.4)

There is a printing error in the "Brick Veneer/Concrete Masonry Veneer" row under the "Sheathing Paper Required" column. The box should actually say "Note".

X Chart has been completely revised in 2003 IRC.

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207 R703.6.2.1

A min. .019" (#26 Gal. Sheet gauge), corrosion-resistant weep screed or plastic weep screed w/min. vertical attachment flange of 3 1/2" shall be provided at or below the foundation plate line on ext. studwalls. Weep screed placed minimu, 4" above earth or 2" above paved areas and shall allow trapped water to drain to ext. of bldg. the weather resistant varrier shall lap the attachment flange. The ext. lath shall cover and terminate on the attachment flange of weep screed.

210 R703.7.2.1

The maximum slope of roof construction without stops shall be 7:12. Stops shall be min. 3" X 3" X 1/4" steel plate welded to the angle at 24" o.c. along the angle or as approved by the Building Official.

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207 R703.7.3 Lintels. Veneer over openings must be supported on lintels of noncombustible materials per table R703.7.1. Other engineered tables may be used in lieu of table R703.7.1.

XAdd current lintel chart. New chart revisions on 2003 IRC.

207 R703.7.4.1

Brick ties must be spaced no more the 24 inches on center horizontally and may not support more than 3.25 SF of wall area. Based on a 24 inch horizontal spacing, vertical spacing may be no more than 19.5 inches o.c.

XChanges in 2003 IRC: teis to be spaced not more than 24" vertically & horizontally, and shall support not more than 2.67 s.f. of wall area.

208 R703.9

This section addresses EIFS (Exterior Insulation Finish Systems) such as "Dryvit" and must be installed in accordance with the manufacturers instructions. A weather barrier must be installed between the water-sensitive materials and the insulation as well as a method to drain moisture/water to the exterior of the veneer.


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211 R703.10.1

New Entry: Fiber cement panel siding shall be installed long dimension parallel to framing. Vertical joints occur over framing members and sealed with caulk or battens. Horizontal joints shall be flashed with z-flashing and blocked with solid wood framing.

211 R703.10.2

Horizontal lap siding lapped a min. 1 1/4" and shall have the ends sealed with caulking, covered with an H-section joint cover or over a strip of flashing. Fastener heads installed per manufacturer's installation instructions.

ROOF-CEILING CONSTRUCTION

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217 R802.5.1This section is relatively the same as the CABO code with a maximum span of 4 feet between braces. An amendment is proposed to allow 6' between braces if the braces are increased to 2 X 6 lumber.

XSummary Discussion. Consider alternate proposals. No change in 2003 IRC.

219-233

Tb. R802.5.1(1-8) Span tables have been expanded and include a formula that reduces rafter spans when ceiling joists are attached to the rafters such as in a cathedral ceiling.

XVerify validity of calculations. Changes to Table on page 223.

240 R802.10.5 Truss to wall connection: (New Entry) Trusses to be connected to wall plate with approved connectors to resist wind uplift of not less than 175 lbs.

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236 R802.11

Roof tie-downs. In order to determine when tie downs are required, we have to determine when the uplift pressure exceeds 20 PSF. Start with figure R301.2(8) on pg. 37. Find the area of your building in zones 1,2, &3 for the type of roof under consideration (REM dimension "a" is always 4 feet). Next, go to table R301.2(2) on pg 22. At the left of the table, find your particular roof slope (in degrees), then move to the right to the different zones (1,2 & 3) in the row which closest meets the areas you found above. Under the 90 MPH column, note both the positive and negative numbers and multiply them by the factor found in table R301.2(3) for the exposure and average roof height under consideration. A final product of less than -20 or more than 20 calls for rafter tie-downs. Yes, even exposure B can result in the use of tie-downs. A continuous load path must be provided to transmit the uplift forces from the rafter (or truss) tie to the foundation.

XSubject to further clarification. Table R802.11 has changed in 2003 IRC. That may need further clarification.

253 R903.2 Flashing definition now includes roof.

260 R905.10.4Three hundred series stainless steel fasteners shall be used for copper roofs - instead of hard copper or copper allow as in 2000 IRC.

CHAPTER 9

251 R903.4

This section regulates drainage of flat roofs that contain drains. Requirements are similar to commercial construction requiring scuppers and overflow drains. Drains must be sized per the IPC.

X No changes in 2003 IRC.

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259 R907.3

No longers allows a third layer of shingles to be installed over an existing roof contain two or more layers. Prohibits a second layer of asphalt shingles to be installed over an existing single layer due to our location in high hail risk area.

X*Item 4 in 2000 IRC requiring 2nd layer in high hail risk zone has been deleted.

CHAPTER 10

261 R1001.2Limits chimney corbelling to 1/2 the chimney's wall thickness. The 1995 CABO allowed up to 6 inches.


264 R1001.15

New exception allows combustible materials such as siding and wood floor decking to abut a masonry chimney on the exterior of the building if the material is at least 12 inches away from the inside surface of the fire box.


263 R1001.6.1 New entry on spark arrestors.

270 R1003.5.1New expanded definition for steel fireplace unit requirements.

269 R1005.2New sentence prohibits the exterior air intake of a masonry fire place to be taken from a source higher than the firebox.

X2003 IRC re-defines cr4awlspaces and attics as "non-mechanically ventiliated".

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CHAPTER 11

271 N1101.2.1

Energy Efficiency - This section allows the builder to use the provisions in this chapter or the requirements in the 2000 International Energy Conservation Code. Using the provision in the IRC will require slab perimeter insulation. However, if the 2000 IECC is utilized (see chapter 5, pgs. 80-84), perimeter insulation can generally be eliminated if window area is limited to 12% of the wall area or less. However, the 12% window area can be exceeded (20% max.), if attic insulation is increased to R-38. Window area can be increased to 25% if walls are increased to R-19 as well as an R-38 attic. See 3,000-3,499 Heating Degree Days row.

X Summary Discussion

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Documents

2000/2003 IRC Building Code Comparison - St. Paul …stpaulcorrugating.com/pdf/IRC 2000-2003 comparison.pdf · 106.1.2 Installation Instructions, can be kept in permit file when submitted