What is Weapon Strength Damage?

I see weapon strength damage as a buff in masterworking.
What is it? What does it do?

 

source: http://sotawiki.net/sota/Strength_Damage_Divider

Each weapon in the game has an associated SDD (Strength Damage Divider). Bows, for example, have a high value for SDD which when used as a divider against your Strength attribute gets you a low strength bonus for that weapon.

Melee weapons have a lower SDD value so blades, polearms and bludgeons benefit more from your strength.

Weapon Strength Damage enhances the weapon's damage bonus derived from your strength and the weapon's SDD value - but I do not know what the exact formula
is

 

Like everything in this game that has to do with stats and char details beyond just "you have str, dex, int" nothing is outlined, at least if they don't want to, give us the formula so we can make our own character sheets in excel..

 

It increases the effect your strength has on the weapons damage.

 

I went ahead and created a strength damage calculator for you guys.

http://sotadeck.com/strength-damage-calculator

You can plug in your strength, the "Strength Damage" value of your weapon and also the +% strength damage masterwork to see the damage it gives you.