The information given to you so far by all these guys is really good. The link posted by Metwrench is great. You can now visualize what these T-Hangars actually look like.
I see that you are also from Toronto. If you want to see T-Hangars up close and personal, just take a nice drive out to the Brampton Airport (NC3). It's only 12 miles northwest of Toronto's Pearson Intl Airport (CYYZ). This airport has a whole bunch of T-Hangars (I'll guess over 20 that hold about 20 aircraft each). Other GA Municipal airports around Toronto, such as Buttonvile, City Center, Oshawa, etc, don't have T-Hangars like Brampton does.
As mentioned and shown above, these hangars are quite unique. I've even seen photos of individual T-Hangars that housed only ONE aircraft (located at Brampton Airport in the mid-50's). They were literally wooden hangars shaped like a T, that you could squeeze 1 bird into. I wonder why they didn't just build them square, when they sat in a field all alone? They would have had more room.
>Check out this site: www.flybrampton.com Once the homepage comes up, click on the word AIRPORT. In the photo of Brampton Airport, the clump of rusty coloured buildings beside the parking ramp are actually ALL T-Hangars. They're in great condition, and are painted orange.
Vaporlock, if you haven't been to Brampton Airport, you should visit it some day. It's a great place to watch small aircraft flying on weekends. LOTS OF FUN!!!