Unlike a regular calculator, the Construction Master IV has intuitively labeled "construction keys" and a format that is so simple, even the novice user will find it easy to solve hundreds of problems directly in feet, inches and fractions:

• More New Solutions For Rafters and Right Angles! Custom Pitch, Rise, Run, Diagonal, and Hip/Valley and Jack keys now instantly find lengths for: Common Rafters, Regular 45� and Irregular (non-45�) Hip/Valley & Jack Rafters. Stores Pitch in inchesand degrees.
• NEW! "Paperless" Tape! For reviewing past 20 entries.
• NEW! Weight-per-Volume (lbs, tons, kg) key! Lets you convert between weights and find weights of any material (i.e., tons per cubic yard, etc.).
• NEW! Rake-Wall key! Gives you each stud length for any pitch or o.c. spacing.
• Improved Stair key! Instantly finds number of Risers, Treads, Riser height, Tread width, any Overage or Underage. Also gives Stringer Length and Incline Angle.
• Instant Circumference,Circle Area & Arc Lengths! One button solves post holes, columns, pillars, arches and more.
• Board Feet and Unit Price keys! Help estimate material amounts and costs instantly.
• Repeat Function for Operators ( +, -, x, �)
• NEW! "Smart" Fraction Setting! Saves keystrokes by entering preset denominators for you.