[Engineerz]

I have a job that originally spec'd 20 gauge N deck. Now a concrete roof will be poured over the roof decking and the contractor changed the decking to a 20 gauge "Q" deck. I cant find spec's for a Q deck anywhere. Is is the same as B? Is is sufficient to hold the weight of the concrete with 7 foot spans?

 

[Kgmz]

3" deep type N deck is also known as Q-Deck.

Can't you just ask the contractor who the supplier is, and get the info from them.

 

[Engineerz]

n vs. q

I specified 20 gauge 3" N deck, he used 20 gauge, 1-1/2" "Q" deck.

 

[Anti-wingnut]

Is it sufficient to hold the weight of the concrete with 7 foot spans?

I would ask an engineer

 

[AaronB.]

Find the manufacturer and get the max span from them and find out the max weight for said span.