Regular 6-week WSU loans can be renewed as many times as you like, providing no one has requested the item.
Summit loans can be renewed once.
Bound journals and media items are allowed one renewal.
Reserves (course reserves, textbooks on reserve) are non-renewable.
Laptops may be renewable at the Circulation desk, depending on availability.
Interlibrary Loan items are usually renewable, but it depends upon the wishes of the owning institution - you must request to renew these items before the due date.