(6) Class 6: (a) Heavy foot and steel tire traffic. (b) Used for heavy industrial structures. (c) Over 8” thick (d) 28 day compressive strength of 5,000 to 8,000 psi. (On SLIDE #78) c. The excavation for the slab foundation is made for the footings only. The depth of the footings is dictated by the depth required to ensure the bottom of the footing is below the frost line. If bearing walls are erected on the slab, the width of the footing base is twice the width of the wall itself. On SLIDE #79) (On SLIDE #80) d. The slab itself is placed on the ground surface and is formed using either 2" x 4" or 2" x 6" form material. e. Slab foundations must have a base course lift of a minimum of 4" of compacted gravel, sand, or crushed rock under the concrete slab to act as an insulator and provide additional stability for the slab itself. f. A polyethylene vapor barrier of at least .006 mil plastic is placed between the gravel base course and the concrete slab to prevent
(6) Class 6: (a) Heavy foot and steel tire traffic. (b) Used for heavy industrial structures. (c) Over 8” thick (d) 28 day compressive strength of 5,000 to 8,000 psi. (On SLIDE #78) c. The excavation for the slab foundation is made for the footings only. The depth of the footings is dictated by the depth required to ensure the bottom of the footing is below the frost line. If bearing walls are erected on the slab, the width of the footing base is twice the width of the wall itself. On SLIDE #79) (On SLIDE #80) d. The slab itself is placed on the ground surface and is formed using either 2" x 4" or 2" x 6" form material. e. Slab foundations must have a base course lift of a minimum of 4" of compacted gravel, sand, or crushed rock under the concrete slab to act as an insulator and provide additional stability for the slab itself. f. A polyethylene vapor barrier of at least .006 mil plastic is placed between the gravel base course and the concrete slab to prevent
COMPLETED%20DESIGN%20VERTICAL%20CONSTRUCTION%20INSTR%20LP.docx