美国采购需求：镀锌钢卷、ZM钢卷、镀铝钢卷、H型钢、钢桁架、铝卷

I'm looking to procure roofing trusses for an upcoming project. We need a reliable supplier who can provide high-quality products that meet our specifications. It's essential that the trusses are durable and suitable for various roof types, as we'll be using them in multiple applications. Please share information regarding your available options, including materials, load capacities, and any custom solutions you might offer. Additionally, I'm interested in understanding your lead times and pricing structures. If you have any certifications or compliance with industry standards, that would be great to know as well. Please send over your product catalogs or any relevant details that can help us make an informed decision. Looking forward to your prompt response!