After creating filetable I've got a shared folder
\\<my domain>\mssqlserver\<filestream directory>\<my table>
I've made all nesessary settings in SqlServer Configuration manager to make it available and added couple of files with database stored proc.
I made virtual folder for my web site
http://localhost/<my ewb site>/<virtual folder>/
referencing shared table folder.
When I try to get file from folder I get en error: HTTP 500.19 - Internal Server Error Code 0x80070032
I found something in answer of this question Access Denied when inserting file into Sql Server 2012 FileTable using File.CreateFile in ASP.NET website
But it's only a database part of configuring. I don't understand how to configure IIS and virtual folder to grant access to shared folder.