Rhode Island Code of Regulations › Title 510 - Building Code Commission › Chapter 00 - N/A › Subchapter 00 - N/A › Part 2 - RISBC-2 Rhode Island State One amp; Two-Family Dwelling Code › Section 510-RICR-00-00-2.6 - Chapter 4

Current through June 14, 2024
Table R401.4.1 Delete IRC Table R401.4.1 and substitute the
					 following:
Table R401.4.1
Presumptive Load-Bearing Values of Foundation
								 Materials
Type of Soil
Load Bearing Pressure psf
Crystalline Bedrock
12,000-20,000 psf
Sedimentary and Foliated Rock
8,000-12,000 psf
Medium Dense-to-Dense Sandy Gravel and
								 Gravel
4,000 psf
Medium Dense-to-Dense well-graded Sand, Silty
								 Sand and Silty Gravel
3,000 psf
Firm Fine Sand, Silty Sand and Silty
								 Gravel
1,500 psf
Loose Fine Sand, Silty Sand, organic soils, clay
								 and areas suspected at being filled
1,000 psf
Table R402.2 Delete IRC Table R402.2 and substitute the
					 following:
TABLE NO R-402.2
MINIMUM SPECIFIED COMPRESSIVE STRENGTH OF
								 CONCRETE
LOCATION
MINIMUM f'c OF CONCRETE AT
								 28 DAYS
Basement and foundation walls, continuous and
								 isolated footings, basement and garage slabs
2500 psi
*Exterior slabs, walks and steps exposed to
								 weather
3000 psi
*Exterior slabs shall be air-entrained
								 concrete
Delete section R403.1.4.1 Frost Protection and substitute
					 the following:
R403.1.4.1 Frost
				 Protection.
Except where otherwise protected from frost, foundation
					 walls, piers and other permanent supports of buildings and structures shall be
					 protected from frost by one (1) or more of the following methods:
Extending below the frost line specified in Table
					 R301.2.(1)
Constructing in accordance with section R403.3
Constructing in accordance with ASCE32-01;
Erected on solid rock.
Exceptions:
Freestanding accessory structures with an area of two
					 hundred (200) square feet (18.5 m2) or less and an
					 eave height of ten feet (10') (3048 mm) or less shall not be required to be
					 protected.
Decks not supported by a dwelling need not be provided with
					 footings that extend below the frost line.
Footings shall not bear on frozen soil unless such frozen
					 condition is of a permanent character.
R403.1.6 Delete sections R403.1.6 and
				 R403.1.6.1 and substitute the following:
R403.1.6 General Foundation Anchorage.
Foundation sill plates at exterior walls shall be anchored
					 to the foundation as follows:
1 + 2 story buildings
1/2" @ 48" o/c or
5/8" @ 72" o/c
3 story building
1/2" @ 24" o/c or
5/8" @ 36" o/c
Bolts shall be spaced not more than twelve inches (12")
					 from the corners.
Bolts shall extend a minimum of fifteen inches (15") into
					 masonry or seven inches (7") into concrete. Sill plates shall be protected from
					 decay in accordance with section R323.
Nuts and washers shall be tightened on each bolt to the
					 plate and shall not be recessed or countersink into the first plate.
Bolts shall be high enough to allow for full engagement of
					 the nut and nuts shall be left exposed for inspection at the framing stage of
					 construction.
Exception:
Foundation anchor straps, spaced as required to provide
					 equivalent anchorage to one half inch (1/2") diameter anchor bolts.
R403.1.6.1 Braced Panel Anchorage.
Shear walls shall be anchored to the foundation in
					 accordance with Appendix AA or the reference standards in R301.2.1.1.
The shear wall connections shall be in addition to general
					 foundation anchorage requirements.
TABLE R404.1.2(1)
MINIMUM HORIZONTAL REINFORCEMENT FOR CONCRETE BASEMENT
					 WALLS 
					 A, B
MAXIMUM UNSUPPORTED HEIGHT OF BASEMENT
								 WALLS
LOCATION OF HORIZONTAL REINFORCEMENT
> 8
One No.4 bar within 12 inches of the top of the
								 wall story and one No.4 bar near third points in the wall story