( heavy crossbow can be crafted with the following recipes

Player Recipe
Primary skill used: fabrication(6)
Required skills: N/A
Time to complete: 60 minutes
Tools required:
> 1 tool with cutting quality of 1
> 1 tool with hammering quality of 1
> 1 tool with screw driving quality of 1
> 1 tool with bolt turning quality of 1
> 1 tool with metal sawing quality of 1
> 1 tool with wood sawing quality of 1
Components required:
> 8x plank OR 16x heavy stick
> 2x short rope OR 2x short vine
> 1x foot crank
> 4x spring
> 4x chunk of steel OR 12x scrap metal
> 60x nail
Byproducts:
(none)
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This recipe can be found in the following books when fabrication is at least the required level:
The Bowyer's Buddy (level 6)
The Historic Weaponsmith (level 6)