Because of architectural reasons, the cross section for the beam below is limited to dimensions of b=350 mm and h=600 mm. Assume fy=420 MPa and fc'=28 MPa to solve the followings: Carry out any necessary checks. (the given dead load does NOT include the beam weight) 1) Determine the reinforcement required at each critical section (use 025) 2) Sketch your final design Wp = 30 kN/m, wų = 20 kN/m (Z/8) m - (Z/3) m +(Z/8) m- Z=17.9

What precautions should you take to prevent injuries when dealing with heavy loads?

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented