Hi jewel2316,
Welcome to the Mattress Forum!
If you scroll down to the section entitled SLATTED PLATFORM BEDS in the foundation thread here, there are many options that have platform beds without a center leg. I just found over a dozen briefly clicking through there. Savvy Rest also has a few nice ones available (Esmont and Afton).
Regarding Ikea, their bases usually use a head to toe steel beam without a leg. I know it can be confusing to figure things out from their photos, but if you are on a page for a particular platform bed on their site and if you click on the “Assembly & Documents” tab next to the tabs for “Product Details”, “Environment & Details” and “Package Details”, it will show you the assembly instructions for any product in which you have an interest and then you’ll be able to find out exactly what the product contains.
I think with a few clicks you’ll be able to come up with quite a few options, many of which will also be sturdier than the item you currently have on order.
I’ll be interested to learn if you find anything else that suits all of your needs.
Phoenix