9-1B-48: IRC ONE-AND-TWO-FAMILY DWELLING BUILDING CODE AMENDMENT, TABLE R403.1(1) MINIMUM WIDTH AND THICKNESS FOR CONCRETE FOOTINGS FOR LIGHT-FRAME CONSTRUCTION, TABLE R403.1(2) MINIMUM WIDTH AND THICKNESS FOR CONCRETE FOOTINGS FOR LIGHT-FRAME CONSTRUCTION WITH BRICK VENEER, TABLE R403.1(3) MINIMUM WIDTH AND THICKNESS FOR CONCRETE FOOTINGS WITH CAST-IN-PLACE OR FULLY GROUTED MASONRY WALL CONSTRUCTION, AND TABLE R403.4 MINIMUM DEPTH (D) AND WIDTH (W) OF CRUSHED STONE FOOTINGS, ARE DELETED:

Table R403.1(1) Minimum Width And Thickness For Concrete Footings For Light-Frame Construction, Table R403.1(2) Minimum Width And Thickness For Concrete Footings For Light-Frame Construction With Brick Veneer, Table R403.1(3) Minimum Width And Thickness For Concrete Footings With Cast-In-Place Or Fully Grouted Masonry Wall Construction, and Table R403 Minimum Depth (D) and Width (W) Of Crushed Stone Footings, are hereby deleted.

(Ord. 40-20, 12-1-2020, eff. 1-1-2021)

9-1B-49: IRC ONE-AND-TWO-FAMILY DWELLING BUILDING CODE AMENDMENT, ADD TABLE R403.1, MINIMUM WIDTH OF CONCRETE, PRECAST, OR MASONRY FOOTINGS:

Add Table R403.1, Minimum Width Of Concrete, Precast, Or Masonry Footings as follows:

   TABLE R403.1

   MINIMUM WIDTH OF CONCRETE, PRECAST, OR MASONRY FOOTINGS (inches)a

	LOAD-BEARING VALUE OF SOIL (psf)
	1,500	2,000	3,000	4,000
Conventional light-frame construction
1-Story	12	12	12	12
2-Story	15	12	12	12
3-Story	23	17	12	12
4-inch brick veneer over light-frame or 8-inch hollow concrete masonry
1-Story	12	12	12	12
2-Story	21	16	12	12
3-Story	32	24	16	12
8-inch solid or fully grouted masonry
1-Story	16	12	12	12
2-Story	29	21	14	12
3-Story	42	32	21	16

 

   For SI: 1 inch = 25.4mm, 1 pound per square foot = 0.0479 kPa.

   a.   Where minimum footing width is twelve (12) inches, use of a single wythe of solid or fully grouted twelve (12) inch nominal concrete masonry units is permitted.

(Ord. 40-20, 12-1-2020, eff. 1-1-2021)

9-1B-50: IRC ONE-AND-TWO-FAMILY DWELLING BUILDING CODE AMENDMENT, SECTION R403.1.1, MINIMUM SIZE:

Repeal Section R403.1.1, Minimum size, and replace as follows:

   R403.1.1 Minimum size. Minimum sizes for concrete and masonry footings shall be as set forth in Table R403.1 and Figure R403.1(1). The footing width (W) shall be based on the load bearing value of the soil in accordance with Table R401.4.1. Spread footings shall be at least six (6) inches in thickness (T). Footing projections (P) shall be at least two (2) inches and shall not exceed the thickness of the footing. The size of

   footings supporting piers and columns shall be based on the tributary load and allowable soil pressure in accordance with Table R401.4.1. Footings for wood foundations shall be in accordance with the details set forth in Section R403.2 and Figures R403.1(2) and R403.1(3).

(Ord. 40-20, 12-1-2020, eff. 1-1-2021)

9-1B-51: IRC ONE-AND-TWO-FAMILY DWELLING BUILDING CODE AMENDMENT, SECTION R602.10, WALL BRACING:

   R602.10 Wall bracing. Buildings shall be braced in accordance with this section or, when applicable, section R602.12 or the most current version of APA System Report SR-102 at the time of application for a permit as an alternate method. Where a building, or portion thereof, does not comply with one or more of the bracing requirements in this section, those portions shall be designed and constructed in accordance with section R301.1.

(Ord. 44-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 40-20, 12-1-2020, eff. 1-1-2021)

9-1B-52: IRC ONE-AND-TWO-FAMILY DWELLING BUILDING CODE AMENDMENT, SECTION R903.1, GENERAL ROOF COVERING:

   R903.1 General. Roof decks shall be covered with approved roof coverings secured to the building or structure in accordance with the provisions of this chapter. Roof coverings shall be designed, installed, and maintained in accordance with this code and the approved manufacturer's installation instructions such that the roof covering shall serve to protect the building or structure. Roof covering requirements for hillside and Wildland Urban Interface areas are to be as regulated by the Fire Prevention Code, of Boise City Code.

(Ord. 44-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 40-20, 12-1-2020, eff. 1-1-2021)

9-1B-53: ADDITION OF GRADING PROVISIONS RELATED TO ONE-AND-TWO-FAMILY DWELLINGS:

Where determined to be applicable, such as for hillside sites or fill sites, grading, excavation and earthwork construction, including fills and embankments, shall be regulated by Appendix J Grading of the International Building Code as adopted by the Building Code of Boise City.

(Ord. 40-20, 12-1-2020, eff. 1-1-2021)

9-1B-54: ADDITION OF MINIMUM STANDARDS FOR MODULAR NON-HUD STRUCTURES AND MANUFACTURED PRE-HUD STRUCTURES:

Modular non-HUD structures to be occupied within the city of Boise City shall adhere to the following:

All new modular (non-HUD) structures must bear the insignia from the State of Idaho Division of Building Safety and shall only be allowed to be occupied for the use listing on the insignia.

To gain approval for an existing modular (non-HUD) structure, the structure must undergo procedures as required by the State of Idaho Division of Building Safety and must bear the insignia prior to being allowed to be occupied for the use listed on the insignia.

Manufactured pre-HUD structures to be occupied within the city of Boise City shall adhere to the following:

All pre-HUD manufactured homes constructed prior to June 15, 1976, shall comply with the Mobile Home Rehabilitation Act, Title 44, Chapter 25, of Idaho Code prior to occupancy.

(Ord. 44-17, 12-19-2017, eff. 1-1-2018; amd. Ord. 40-20, 12-1-2020, eff. 1-1-2021)

9-1B-55: FIRE SPRINKLER AND ALTERNATIVE EXTINGUISHING SYSTEM PERMITS, PLAN REVIEW, INSPECTIONS, AND FEES:

   A.   Approval Required: Fire sprinkler and alternative extinguishing systems plans and associated submittals, as required by the International Fire Code and sprinkler system design standard(s), shall be permitted and approved by Planning and Development Services and the Fire Department, with fees assessed and paid for, before any related work begins.

   B.   Fees Assessed: The plan review and inspection fee shall be assessed in accordance with the provisions of the Boise City Building Code Fee Schedule as adopted by the City Council, which will be kept on file at the Planning and Development Services permit counter, Boise City Clerk's office, or on the Planning and Development Services website. All permit fees shall be reviewed by the Building Code Board prior to adoption by City Council.

   C.   Work Requiring Permit: Permits shall be issued for the following work:

      1.   New fire sprinkler and alternative extinguishing systems;

      2.   Additions, modifications, and changes to existing fire sprinkler and alternative extinguishing systems, underground lines, and/or associated equipment.

      3.   All fees shall be paid in full when the permit is issued.

   D.   Other Inspection, Plan Review, And Administrative Fees: The permit fee shall cover the cost of three (3) plan reviews and two (2) field inspections for each inspection category. An additional hourly rate fee in an amount established by the Boise City Building Code Fee Schedule as adopted by the City Council may be assessed, beginning after the third review, on re-submittals of denied plans and/or calculations. An additional fee or hourly rate fee in an amount established by the Boise City Building Code Fee Schedule as adopted by the City Council may be assessed for reinspections, after hours inspections, or other additional field inspections performed.

   E.   Plan Modifications: Plan modification revisions submitted for approval after a permit and approved plans have been issued, shall be assessed the additional plan review hourly rate fee, plus the fee based on the number of sprinklers or nozzles affected by the modification.

   F.   Application Submittal Documents: Project plans and other data as required by Boise City submittal checklists shall be submitted with a completed fire sprinkler permit application, available from Boise City's Planning and Development Services Department.

(Ord. 44-17, 12-19-2017, eff. 1-1-2018; amd. 2019 Code; Ord. 40-20, 12-1-2020, eff. 1-1-2021)