I recommend not to order here. I submitted a DWG file and the manufacturer stated in black and white, via an e-mail, that he would make the object as in the DWG file. The floor would consist of HEA160 all around with IPE100 in between to support the floor plates. This for the agreed price. Once started, the manufacturer asked a question about a construction beam (HEA160 beam) that had to be incorporated into the floor. Then came the message that he wanted an extra US$ 240 per unit. Then I discovered - on images made by the manufacturer - that the HEA 160 beam, which he had previously asked about, was no longer in the floor construction at all! Without consultation, the DWG file had been deviated from. If I wanted the HEA160, I had to pay an extra US$ 1000. What I didn't know is that he not only changed the HEA160 beam to a lighter construction but downgraded the entire floor. Also the whole thing wasn't galvanized but sprayed silver. The welding was also bad everything was warped. Bad!