(On SLIDE #69) (3) Type III (a) Type III slabs are constructed over problem soils. They are reinforced and stiffened to transmit structure loads to the foundation soil. (b) Type III slabs can be built on problem soils such as CL, OL, CH, OH. High organic soils (PT) should not be used to support Type III slabs. (On SLIDE #70) (4) Type IV (a) Type IV slabs are greater than 4" nominal thickness. The base course (slab bed) material functions as only as a form to provide temporary support during curing. (b) They do not depend on the foundation soil for support. (c) The soil for Type IV slabs can be CL, OL, CH, OH, and PT. (d) Type IV slabs must be designed by professional structural engineers. Structurally supported slabs are independently supported and rest on foundation walls, and piers. They are structurally reinforced, and can be used over very poor soils and are designated as Type IV. (On #71) b. The type of slab to be poured falls into 6 specific classifications for projects requiring slab work. These classifications enable us to design the minimum thickness required for a slab to carry a load without failing. (On SLIDE #72) (1) Class 1: (a) Light foot traffic. (b) Used for light frame structures. (c) Minimum of 4” thick. (d) 28 day compressive strength of 3,500 psi.
(On SLIDE #69) (3) Type III (a) Type III slabs are constructed over problem soils. They are reinforced and stiffened to transmit structure loads to the foundation soil. (b) Type III slabs can be built on problem soils such as CL, OL, CH, OH. High organic soils (PT) should not be used to support Type III slabs. (On SLIDE #70) (4) Type IV (a) Type IV slabs are greater than 4" nominal thickness. The base course (slab bed) material functions as only as a form to provide temporary support during curing. (b) They do not depend on the foundation soil for support. (c) The soil for Type IV slabs can be CL, OL, CH, OH, and PT. (d) Type IV slabs must be designed by professional structural engineers. Structurally supported slabs are independently supported and rest on foundation walls, and piers. They are structurally reinforced, and can be used over very poor soils and are designated as Type IV. (On #71) b. The type of slab to be poured falls into 6 specific classifications for projects requiring slab work. These classifications enable us to design the minimum thickness required for a slab to carry a load without failing. (On SLIDE #72) (1) Class 1: (a) Light foot traffic. (b) Used for light frame structures. (c) Minimum of 4” thick. (d) 28 day compressive strength of 3,500 psi.
COMPLETED%20DESIGN%20VERTICAL%20CONSTRUCTION%20INSTR%20LP.docx