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Existing Clay Tile Floor load capacity

Existing Clay Tile Floor load capacity

Existing Clay Tile Floor load capacity

Hello all,

I'm currently working on a project in which I need to evaluate the load-carrying capacity of a One-Way Structural Clay Tile & Concrete Joist floor. The building was built in 1954. Unfortunately no plans are available. I'd like to have some core samples taken to determine the concrete strength as well as the topping thickness and clay tile thickness. I've never dealt with this type of floor system before so I'm a little unsure of where the cores could be taken, but if I'm visualizing this floor system correctly, I believe the clay tiles act more as a stay-in-place form. That being said, would it be ok to core down through the topping and tile, or would any coring not be recommended? I've attached a diagram of the floor system for reference. Thanks for the help.

RE: Existing Clay Tile Floor load capacity

You are correct that the tile is not structural...just a stay-in-place form.

Cores through the slab near the ends of the joists would be strategic but may not have enough depth to allow a proper compressive test.

A horizontal core through a joist stem near mispan might work. You’d have to remove some tile though to do that.

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RE: Existing Clay Tile Floor load capacity

Back in the day, the tile was also for fireproofing. Try this link, go to page 68.


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