Abstract: A triangular, adjustable roof scaffolding support which weighs from about 3 to about 4.5 pounds and which preferably has a duty rating of at least about 2,000 pounds is disclosed. This scaffolding support contains a steel base, means for attaching said steel base to the surface of a roof, a first adjustable aluminum arm hingably attached to one portion of said base, means for hingably attaching said first aluminum arm to one portion of said base, a second adjustable aluminum arm hingably attached to another portion of said base, means for attaching said second aluminum arm to said other portion of said base, means for attaching said first aluminum arm and said second aluminum arm to each other, and means for securing a plank to at least one of said adjustable aluminum arms.