WHEN CLIMMING A LADDER ,SHOULD YOU BE HOLDING A LADDER WITH TWO HANDS

I WAS WORKING FOR A SALTALITE COMPANY ,SOME JOBS REQUIRED YOU TO PUT UP A HEAVIER DISH WHICH REQUIRES 8 CINDER BLOCKS TO HOLD DOWN THE DISH ,WE WORK ALONE ,MOST TRUCKS ONLY HAVE A 32 FT. LADDER ,I HAVE USE LADDERS BEFORE IN THE ELECTRICAL ,BUT NEVER CARRIED CINDER BLOCKS UP A LADDER ,IS THIS A SAFE WAY TO DO THIS ,