Question about material selection (c14/c24)

[_boriz]

I'm building shelves in the garage. The red ones in the picture are already built. There I used C24 95x45 that I had lying around. Now when I'm going to build the others (green), is C14 enough?
They will be 2500x600mm and there are studs approximately every 500mm across the width. C24 is stronger when building walls as they handle more lengthwise, but are they equally strong lying flat?

 

[z_bumbi]

What are you planning to have on the shelves considering the dimensions?

 

[_boriz]

What are you planning to put on the shelves considering the dimensions?

I forgot to write that.

Moving boxes and plastic bins (with the same dimensions). I guess the weight will be around 200kg, max 250kg.

Edit: say 300 to be on the safe side.

 

[z_bumbi]

I was thinking more about engines or safes considering the 45 mm thick shelves. If I understand the construction correctly, I see no problem with downgrading the class of the lumber.

 

[_boriz]

I was thinking more about engines or safes considering 45 mm thick shelves. If I understand the construction correctly, I see no problem with going down a class on the timber.

Good to hear.
A follow-up question then. Would it be safe to go down to 70mm instead of 95? What can a 70x45 beam handle in terms of length?

 

[fribygg]

It will hold.

If you want to make it cheaper, 20 mm råspont will likely work well for shelves in the garage.