Most standard strikes will not operate when there is a load on them.
Securitron makes a strike called the "unlatch" which the deadlatch portion of the strike drops in and then the strike pushes the deadlatch and the latch into the door to allow the door to open.
http://www.securitron.com/en/site/securitr...UnLatch-Strike/
For you guys who want to monitor everything it can even be ordered with a latch monitoring output.
When you cut it in make sure you get the location exactly right. Too shallow, the weather stripping won't seal. Too deep, the latch won't line up properly.