Question

Design the wood wall formworkfor a 14’ - 10” (14.8 ft) high wall to be placed at the rate of pour of 4 ft per hour, internally vibrated.  

Assume the mix is made with Type I cement, with no pozzolans or admixtures, and that the temperature of concrete at placing is 75^oF.  The unit weight of concrete is 150 lbs/ft³with a slump of 3 inches.  

The forms will have continuing reuse.  Assume that deflection is limited to l/360 of the span.  All lumbers are S4S.  Use form grade plywood sheathing ¾ inch thick in 4x8 - ft. sheets. Use 4x4 studs and double 2x6 walers.  4300 lb coil ties are to be used.  

Framing lumber is No. 2 Douglas Fir-Larch.   F_b = 900 psi, F_c= 625 psi (perpendicular to grain), F_c = 1650 psi (parallel to grain), F_v=180 psi, E=1,600,000 psi

Provide the following:

1. A sketch showing the formwork loading diagram
2. Stud size and spacing calculations using both the equations and the formwork tables in the back of the book.  Compare your answers.
3. Waler size and spacing calculations using both the equations and the formwork tables in the back of the book.  Compare your answers.
4. Tie spacing calculations
5. Draw a diagram of your completed design showing all material sizes and spacing dimensions.  

Show all equations, tables used, and other details of your work.

Answer 1

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