Getting a wood burner finally! But I started planning a rack for the firewood and I'm confused about cord wood. OK 4'X4'X8', pretty straightforward. But two 18" logs only go 36" back, even 20" cuts would only be 40 of 48".

Wouldn't 18" logs two deep stacked 4' high and 8' long leave you 25% short? Do I look for a proper cord to then be 5' high if it's two logs deep?