As a rule, lighter shelving needs heavier anchors, because the weight of the shelving provides by itself resistance against accidental bumping.  For earthquake protection the heavier anchors will likely perform better.  Please consult a professional engineer when attempting to meet local safety codes.

• Shelving must be stable with and without the merchandize on it.
• Shelf vertical posts must have heavy duty mounting plates on the bottom.
• The plates distribute the weight over a larger area of the asphalt to prevent sinking.
• Anchors must be installed under the mounting plates.
• Use SP18 or SP58.  The SP10 or SP12 bolts do not have adequate shear capacity.