Channelling cables in the plaster of ceilings

[LankyWill]

Span is the distance between supports, if the rule was concerned with the length then it would say length.
It doesn't matter how many joints there are, the span is still the distance between supports. Not that I've ever seen a joist with a joint in it mid span? Are you sure about this?

common on new builds with tgi or open span joists where future provisions for a lift has been installed.

 

[shanky887614]

easy to find.
tap, tap, stab.........swear
tap,tap, stab......hurray XD
polyfiller holes

 

[Delboybully]

Span is the distance between supports, if the rule was concerned with the length then it would say length.
It doesn't matter how many joints there are, the span is still the distance between supports. Not that I've ever seen a joist with a joint in it mid span? Are you sure about this?

I have only seen it 3 or 4 times. Maybe some builder had removed a wall incorrectly

 

[davesparks]

I have only seen it 3 or 4 times. Maybe some builder had removed a wall incorrectly

That is most likely, unless you were viewing it from above through lifted floorboards and there was in fact an RSJ installed underneath the joists where the wall used to be?