Answer: 80 lbs. per square foot Explanation: It should hold up to 80 pounds 
Srp inc. 
Answer: 50 lbs. per square foot Explanation: Depends on the size of the deck, it's 50 psf × the area of the deck, therefore if you have 50sq ft of deck then, do 50sq'×50psf= 2500lb psf. 
Rock Solid Construction & Handyman services 
Answer: 50 lbs. per square foot Explanation: The average residential deck should be 50 pounds per square foot 
Dmp customs 

ProMatcher 
Answer: 40 lbs. per square foot Explanation: 40lbs is usually the minimum requirement. 
Construct Boss 
Answer: 50 lbs. per square foot Explanation: A basic rule of thumb if built property but can be increased with larger frame support. 
ATX Residential Construction 
Answer: 80 lbs. per square foot Explanation: Needs to have right joist size for projection of project 
Custom Sunrooms & Home Improvements 

ProMatcher 
Answer: Not sure Explanation: Depends on the material and how it is built 
DELEM Remodeling 
Answer: 40 lbs. per square foot Explanation: A deck is built to hold 40 pounds per square foot as "live load", which is everything you place on the deck that can be removed, including people at the same time. 
ArtsWorks, LLC 
Answer: 20 lbs. per square foot Explanation: 20 lbs per square ft put way above code and makes for a much better deck. 
Family Flooring Co. 