These sections are used for a floor. They are supported by concrete walls. I so not know size or location of reinforcement just the general dimensions of the monowing as previously attached
Are they used all across the floor or just on the edge? I expect that it is just on the edge and beyond that would be standard double tees.
Load tables would not help much if you don't know the reinforcement. They are likely pre-stressed but each manufacturer uses different arrangements of pre-stressing strand, different depths and different concrete strengths. Some use lightweight concrete whereas others use standard weight.
The attached link provides some information about double tees, but as can be seen, the allowable load depends on the arrangement of strands.
We usually undertake limited-scope semi-destructive investigation on precast prestressed sections where the shop drawings are not available.
Usually a combination of subsurface radar then some selective probing to expose the strands. Patch back after recording the dia, spacing etc.
Takes an experienced operator to expose strands without damaging them. Tread cautiously! Sometimes the strands are 'slipped' (or debonded) near supports depending on transfer conditions.
