income tax on Beldar work

Can you please explain actual meaning of Beldar (i.e. person who construct house by using hired labours or providing design services)

Charge income of Beldar under section 44AD (i.e. Contractor) and not under 44ADA as not professional 

for 44AD declare income 6% or 8% depending upon conditions

for better position ask contracting party to dedcuted TDS U/.s 194C if possible