I have a table that's 35 inches by 90 inches. It currently

Centres, always.

Is the table sagging because theres no lateral support?. Like its thickness is like sheet of plywood.

>>935183
It sagging a little its not really noticeable unless you sit on the ground and look at it the top is 3/4 inch thick

>>935197
Sounds to me more like you need to brace the top of the table not add more legs.

>>935198
How would you brace it. I used some 1x6s cut to like 88 inches to run down the tabletop. I removed the legs when I did this then attached the legs to the 1x6s

>>935205
For God's sake post a damn picture

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>>935220
Sorry for the shit sketch I am not home. X's are where the table legs are. 1x6s are obviously underneath.

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Bumping with photos finally back.

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1 more

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Last picture

>>935183
>>935205
Maybe Add 1xs or 2xs standing edge under the table. Basically making joists for the table.

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>>935162
flip table over

let it rest a day

biscuit jointer and glue 1x3 to both edge of the front 1x6 jointer 1x6 to back of rear 1x6

or glue and screw stuff the same way if no biscuit jointer

Just do it the easy way and add two more legs as close to the middle as you can.

Add a diagonal piece of metal, like an angle bracket, between the legs and the boards

Any drill bit that isn't poop should be able to drill into the pipes