We are seeking proposals for a stainless steel car parking structure with the following requirements:  
? Structure height: 3-4 storeys  
? Total area: 5,000 sqm  
? Required information:  
 1. Number of parking spaces capacity  
 2. Budget estimate  
 3. Technical specifications  
 4. Lead time  
Please include your company's relevant experience in similar projects and certification details. Suppliers capable of handling European standard projects are preferred.