Working hours

Hi to all I am a junior planning working in oil and gas and doing scheduling.My question is that my company works 10 hours a day and i developed a calender of my company setup up the timing from 6 am- 4:30 pm but when i assing resources and insert work column its show 8 hours even the base calender of resource is my company calender but it shows 8 hours and when i changed it from option setting that company works 50 hours and 10hrs a day that duration chages in decimals like .5 days .8 days. looking for help

Faz