1970's Bondek type steel decking/formwork

[apsix]

Does anyone have any details on this?
It is a decking with 380mm (15") wide pans, flat between the ribs (no additional stiffening formed between the ribs).
It is called up as 'steel decking, plain panels MK.1' on a 1970 Hydro TAS drawing. Section shows dovetail rib shape similar to Bondek.

Thanks

 

[rapt]

That is the original Bondek I. It has very low bond properties compared to todays decks which improved bond a lot since the early 1990's. I would be ignoring it in design personally!

 

[apsix]

Thanks Rapt
I think I've identified it as Lysaght Tri-lok which was phased out about the same time Bondek was introduced. From what I can find there's no mention of it working compositely with the concrete (and the bond would be suspect) so I will ignore it.