What is the designed vertical flex of a posi-joist

[readiescards]

I have a 41 page MiTEK Industries pdf relating to the design of my first floor posi-joists.

 

Just wondering if someone is able to help me read the report to find the expected vertical deflection for a 50kg person walking across the floor. Or even if this value is known since only 3 load cases appeared to be considered:

 

Load Cases Considered: :

1 Vibration Check As EC5 NA.2.6 :

2 Long Term Floor Dead+Floor Imposed :

6 ScreedFlo Construction load Dead

 

Anyone a posi-joist 'expert'?

 

Or is there a stated acceptable floor flex anywhere?

 

(Sorrry I won't go into the history of why I would like to know this data)

 

Paul

 

 

[PeterW]

Spans are based on deflections being limited to 0.003 x span up to a maximum of 14mm. 

 

Thats from the BS Regs

[readiescards]

I've been quoted very often that 12mm was acceptable - but after a while I learned that the 12mm refers to the deflection (sag) after 50 years!

 

Can you kindly tell me where in the BS Regs joist deflections are given, ta