Orion uses a 2-column fixed width css layout with a double horizontal navbar. The width of the main body is 920px, thus still leaving plenty of whitespace on a 1024px display.
The header is of medium height, the logo/link-to-homepage is left-aligned. There is also a search on the right hand side.
The navigational area is placed directly under the header. The 1. level pages are printed on the upper bar, the 2. level pages on the lower one.
The content part of the page is divided into two. The right part is meant for secondary content. If applicable, the right part can also be used to host Google Ads.