Prestressed Safe load Tables - Line Load to Area load

[DavAD]

Dear all,

Hope you are well.

I am new to Safe load tables (Prestressed concrete planks/slabs), and have obtained the safe load tables of local suppliers.

1.
The load capacity is in terms of KN/m^2, and I am getting confused if I just need to divide my line load (300kn/m direction of span) by the width of plank (i.e 1.2m), to obtain the applied load in kn/m2.

i.e. 300kn/m (line load) / 1.2m (width of slab) = 250kn/m^2

2.
If in a particular case I have a UDL and point load (line load in perpendicular to span), should I superimpose and find moment to determine appled w KN/m (i.e w=8m/l^2)

3.
Lastly, should we apply factored loads in safe load tables (SLS) ? or unfactored (ULS)
and Do we take slab weight in consideration i.e. add it to W

Kind Regards

 

[Settingsun]

Don't confuse kN with kg!

#1: Probably, but do you truly have a concentrated line load? A line load over a short span might need special consideration.

#2: Maybe, if the concentrated load is at midspan. Otherwise you may need to consult with the slab designer. That's not a bad thing to do in any case.

#3: This should be given in the supplier's data. Read everything they've provided. If basic information like that isn't clear, I wouldn't use the tables.