ESTIMATICS EXAM QUESTIONS AND ANSWERS

ESTIMATICS Area of a square or rectangle - Answer-Base x Height Area of a triangle - Answer-1/2 (Base x Height) Area of a trapezoid - Answer-[(Base1 + Base2) / 2] x Height Area of a circle - Answer-pi (3.14) x radius of the circle Top chord - Answer-serves as a roof rafter Bottom chord - Answer-serves as a ceiling joist; the length of this chord is the "span" Webbing - Answer-bracing that ties top and bottom chords together Gussets - Answer-wood or metal plates that hold the pieces together at the joints On-Center (o.c.) of the trusses - Answer-is the distance from the centerline of one framing member to the center of the next framing member 3 - Tab Composition shingles - Answer-these range from 200 lb. to 240 lb. and are packaged three bundles per square Waste for a gable roof - retangles - Answer-10% Waste for a hip roof - trapezoids and parallelograms - Answer-15% per square for comp shingles - Answer-assume 3 bundles (.33, .67, 00) per square for wood shingles - Answer-assume 4 bundles (.25, .50, .75, 00) removal of shingles - Answer-estimate for the actual number of squares replacement of shingles - Answer-include waste in the calculation, 10% or 15% according to the material carpet - Answer-12' wide stud walls - Answer-4" thick walls - Answer-8' tall Laminated Shingles - Answer-range from 240 lb. to 500 lb.; come three or four or more bundles per square, and medium to heavy weight shingles Wood Shingles - Answer-are manufactured in random widths and are normally 16", 18", or 24" in length