Design a square spread footing for the following conditions: service dead load = 350 kips, service live load = 275 kips. soil density = 130 pcf (including the weight of the floor slab). allowable soil pressure = 4500 psf at 5 ft below the basement floor. assume an 18 in. by 18 in. interior column (f’c = 5000 psi). footing f’c = 3000 psi and fy = 60 ksi. place bottom of footing at 5ft below floor level. estimate floor thickness as 6 in. (hint: estimate thickness of 36 in.)

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise