510 R.I. Code R. 510-RICR-00-00-2.6
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:
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.
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.
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 |
510 R.I. Code R. 510-RICR-00-00-2.6
Amended effective 2/1/2022