Is there a code for this? I commonly see them sitting on metal chairs.
I consider that ground contact. So, it needs to be pressure-treated lumber.
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There are multiple potential issues with this. The Code references will be from the 2018 IRC/IBC so make sure you know what version they are suppose to be building from. The proper use and installation of a post base would have negated any of these issues.
Are you located in Florida? Are you an Inspector? If so to both then make sure you check for Florida specific requirements since they are all about hurricane damage prevention there.
R317.2, R317.1.1 - Unless you can see a grade stamp on that wood base piece you can not verify it is proper pressure treated lumber. Also the cut ends do not appear to have been properly field treated. A post base made for this purpose will obviously negate the need for this requirement.
IRC R407.3, IBC 2304.10.7 - Can’t tell if that is an anchor bolt between the built-up column pieces or not. However if not it is expected the base piece might only be nailed to the concrete surface which is obviously wrong.
IBC 2304.10.7 - The wood base piece looks like it is partially hanging over the edge of the porch surface.
IBC 2304.10.7 - Check the fasteners between the built-up post and the base piece. Unfortunately this arrangement is not expected to occur (instead use of a proper post base) and as such do not specifically fall into any of the fastener schedules. However they have been excessively fastened and splitting on the narrow edge does look to be occurring as a result. Also nails are not considered acceptable for uplift protection in this application.
IRC 502.9, IBC 2304.10.7 - Also look to the top of that built-up post to ensure they are using proper connectors to attach to the horizontal framing members above it. Again simple nails are not considered sufficient to resist uplift in this application.
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Thank you sir. Much appreciated.
A wood support (pressure treated or not) will wick water up to the column via capillary action and lead to premature rot of the post. That is why metal is preferred.
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And a proper post base will be way stronger.
Too me the base looks fine. Look at the bottom of the posts and the plywood. Also consider how many fasteners, at least 32, are in thee plywood and it is not smashed to bits.
Likely treated plywood or marine grade plywood.
The fastening, fastening technique, and fasteners is whats is in question.
Porch Roof Overhang Buildup Column.
Poor Toe Nail Spacing.
Fastener corrosion. Fasteners not stainless or hot dipped galvanized.
Just my 2 cents.