there is many types of support to be used for counter top for long lasting work... as ... 1) brick wall which takes 2" , 4" or 6" thickness space which is not good for below space as we will waste space for storage under counter... this is used where heavy material is used on top of counter for cutting any food items... 2) marble support... which will take 35mm thk space double support... 3) furniture base if the kitchen working person is using the sink properly for washing purpose and the gaps between the sink and counter top has to be sealed properly for leakage free to avoid any damages for below storage, as i will not prefer this in other area... this can be used only in foreign countries...

There is no average height for the table and chairs.There're height standards for all the furniture. The standard height for the table is 30" and for the chair, it is 18". The depth of the table should be atleast 36". It might be a little broad say 42" but not more. The length if the table is defined with the seats required. The chair seat size should be 16" with the back height be 30" atleast. It might be more depending upon the design of the table.

Yes sure ... we did something which I believe is a club of various ideas and expertise.. Though incomplete now , I will post what we have done till now. First we have around 8 feet appox glass 12 mm between the pillars. secondly we have three boxes 27" in height with focus halogens at the bottom. Now we will decorate these boxes with glass pebbles for awesome reflective / color effect. -I do need idea on what fillers can be used which will make me buy less glass pebbles ..else i would need at least 30kg plus of these pebbles. Thirdly we will now have glass film behind these 3 tall glasses to make it quite attractive and something which will look better with or without light. The idea is to add some golden plants in the middle i.e golden leaves and branches etc. -I would like more input on what films would look great behind these pillars. Or any other idea. I will definitely post once we are done with it.

It depends on various factors like the size of the building, distance between pillars, and floor to floor height. But yes, as Joitree says, this is not something you can just find online. You have to consult a professional structural engineer