There is nothing left, now, of the 8' X 10' HO modular layout I built while on active duty. Hand layed code 70 nickel silver rail on hand cut ties! 
The lesson I learned?.......Flextrack where ever possible! :mrgreen:
I think I still have blisters from hand spiking all that track, and it's been 34 years since the last spike was driven!
If you want to go that route, two spikes per rail, per tie, and to save on the hands, spike every third tie. The club layout was spiked every seventh or eighth tie, and there were constant gauge problems in the track. Every tie, can be done, but is only necessary for appearance. The little bit of track I still have from the old layout is still in gauge, and can be run on, and it has been stored in the basement for over 14 years now.

The lesson I learned?.......Flextrack where ever possible! :mrgreen:
I think I still have blisters from hand spiking all that track, and it's been 34 years since the last spike was driven!
If you want to go that route, two spikes per rail, per tie, and to save on the hands, spike every third tie. The club layout was spiked every seventh or eighth tie, and there were constant gauge problems in the track. Every tie, can be done, but is only necessary for appearance. The little bit of track I still have from the old layout is still in gauge, and can be run on, and it has been stored in the basement for over 14 years now.