I agree on the workout time, people talk about doing 5x5 in an hour including warm-up which I just can't see. For me it was minimum 90 minutes up to 120 minutes when I was reaching my max for 5x5 squat as I had to rest a lot. Maybe <60min 5x5 is possible if you are just starting out and don't need to rest. I find 3x5 is taking me 90 minutes from the time I get out of my car, change, warm-up (10min), lift, stretch after lifting, get back in car.
For deads, as SC says you might be worried about CNS fatigue. If you are near your max for squatting and deads, you are going to hit a wall doing 3 heavy sets of deads after 3/5 heavy sets of squats. I've always just done one heavy working set, with maybe a double/triple at a slightly lower weight before to get some more volume. But only you know your body and what will work best, for example I am deloading on DL's right now so I am doing two working sets and more warm up reps to work on technique issues, I am ok with the volume since I am not near my max.
For deads, as SC says you might be worried about CNS fatigue. If you are near your max for squatting and deads, you are going to hit a wall doing 3 heavy sets of deads after 3/5 heavy sets of squats. I've always just done one heavy working set, with maybe a double/triple at a slightly lower weight before to get some more volume. But only you know your body and what will work best, for example I am deloading on DL's right now so I am doing two working sets and more warm up reps to work on technique issues, I am ok with the volume since I am not near my max.
