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1

Originally Posted By: cbouchea
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What size should the sill plate be?


I saw 2 X4 and 2X6.
Is there any correct answer, or can it be either? ![icon_rolleyes.gif](upload://iqxt7ABYC2TEBomNkCmZARIrQr6.gif)

2

Originally Posted By: jpope
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It usually matches the wall framing material. Either is acceptable as long as the framing lumber is not larger than the sill plate.

–
Jeff Pope


JPI Home Inspection Service


“At JPI, we’ll help you look better”


(661) 212-0738

3

Originally Posted By: jbehling
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Sec. 2317.4. Plates, Sills and Sleepers. All foundation plates or sills and sleepers on a concrete or masonry slab, which is in direct contact with the earth, and sills which rest on concrete or masonry foundations, shall be treated wood or Foundation redwood, all marked or branded by an approved agency.


Additional Local Requirements: Exterior wall sill plates bearing on concrete must be Foundation redwood or pressure treated lumber and must be nominal 2 inch thickness (2x material) with their width at least equal to the width of studs to be used. Steel bolts used for sill anchorage shall be at least 10 inches long.

Ya, what Jeff said ![icon_wink.gif](upload://ssT9V5t45yjlgXqiFRXL04eXtqw.gif)

4

Originally Posted By: jwortham
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Jeff’s my hero! icon_biggrin.gif

5

Originally Posted By: jpope
This post was automatically imported from our archived forum.


Jason’s answer was much more accurate icon_wink.gif

–
Jeff Pope


JPI Home Inspection Service


“At JPI, we’ll help you look better”


(661) 212-0738

6

Originally Posted By: dbroad
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It also depends on weather ist a barring wall and the sheer value as well. I am building a house and some sill plates are 3x6 due to sheer value as all walls in my house are 6". Some sill plates are 1 1/2" and some are 3".

7

Originally Posted By: roconnor
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Quote:
IRC R404.3 Wood sill plates.
Wood sill plates shall be a minimum of 2-inch by 4-inch (51 mm by 102 mm) nominal lumber. Sill plate anchorage shall be in accordance with Sections R403.1.6 and R602.11.

Quote:
IRC R602.3.4 Bottom (sole) plate.
Studs shall have full bearing on a nominal 2 by (38 mm) or larger plate or sill having a width at least equal to the width of the studs.


That is just a minimum to check as a guide.

--
Robert O'Connor, PE
Eagle Engineering ?
Eagle Eye Inspections ?
NACHI Education Committee

I am absolutely amazed sometimes by how much thought goes into doing things wrong
8

Originally Posted By: ekartal
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jbehling wrote:
]Steel bolts used for sill anchorage shall be at least 10 inches long.


Jason you forgot the maximum distance allowed between each bolt. ![icon_wink.gif](upload://ssT9V5t45yjlgXqiFRXL04eXtqw.gif)

Erol Kartal
9

Originally Posted By: roconnor
This post was automatically imported from our archived forum.


Quote:
IRC R403.1.6 Foundation anchorage.
... The wood sole plate at exterior walls on monolithic slabs and wood sill plate shall be anchored to the foundation with anchor bolts spaced a maximum of 6 feet on center ... There shall be a minimum of two bolts per plate section with one bolt located not more than 12 inches or less than seven bolt diameters from each end of the plate section ... Bolts shall be at least 1/2 inch in diameter and shall extend a minimum of 7 inches into masonry or concrete ...

Note that those requirements are just the typical minimums, and additional anchors would be required in higher seismic/wind load regions.

[I added the spacing]

--
Robert O'Connor, PE
Eagle Engineering ?
Eagle Eye Inspections ?
NACHI Education Committee

I am absolutely amazed sometimes by how much thought goes into doing things wrong
10

Originally Posted By: bking
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also the 6ft spaced anchors must be within 1 or 2 ft of any corner, I think 1ft is correct.

–
www.BAKingHomeInspections.com