An atrium has a floor area of 30 m by 20 m and is 20 m high. The ceiling ventilation is designed for a fuel area of 30 m2 with an energy release rate of 0.5 MW/m2. The inlet openings are very large. An effective heat conduction coefficient can be assumed to be 20 W/m2°C.
(a) Calculate the area o...

One of engineering company providing drawings at the end of the Month. I have emailed set of questions to engineering company to include every thing in the drawings tender package. I just do not want to miss any question.....If I did not include any questions which might you come across let me know....

An axial load P is supported by a short W8 X 40 column of a cross-sectional area A = 11.7 in2 (inches squared) and is distributed to a concrete foundation by a square plate as shown (in the attachment) Knowing that the average normal stress in the column must not exceed 35 ksi and that the bearing s...

A 20-kips axial load is applied to a short wooden post which is supported by a concrete footing resting on undisturbed soil as shown. Determine the size "b" of the concrete footing if the average bearing stress on the soil is not to exceed 30 psi.
a. b = 25.8 in.
b. b = 22.4 in.
c. b = 18....

Having problems calculating the penalty cost. Please see attached.
The U.S. Army Corps of Engineers issues purchase instructions informing potential suppliers that roadway graders will be evaluated using the following life cycle cost model:
LCC = unit operating cost, dollars
...

A product plant is being considered for a new booming market. Total fixed cost for design, land, and plant construction is $105. The variable cost of producing product is a function C (n) = 100n - 3 x 10-3 n2 + 10-7 n3 where n = number of product produced.
(a) Determine the total cost function...

If a beam of lenght L is fixed at the ends and loaded in the centre of the beam by a point load of F newtons the deflection at a distance x from one end is given by :
y= (F/ 48Ei)(3L^2x-4x^3)
Find the position and the value of the maximum deflection of the beam if;
L = 10 m
Ei= 300x10^6 Nm^...

The bending moment in a timber beam M, at a point at a distance x from one end of the beam given by the formula :-
M=½{wx(L - x) }
Calculate the values of x when M =50Nm, w =5N/m and L =20m
---
(See attached file for full problem description)

Base isolation technique has become the method of choice for structural design of buildings and bridges located in highly seismic areas in recent years. Please provide of an overview of this approach. Also, discuss the application of rolling type bearings for equipment isolation.

A rigid steel plate is supported by three posts of high-strength concrete each having an effective cross-sectional area A=40,000 mm^2 and Length L=2 m (see attachment). Before the load P is applied, the middle post is shorter than the others by an amount s=1.0 mm.
Determine the maximum allowable lo...

1. What force is required to punch a hole 50 mm in diameter through a 16-mm-thick aluminum-alloy plate? An average stress of 265 MPa will cause this material to shear.
2. How wide a gap should be allowed between the 50-ft-long paving slabs of concrete in a street so that the slabs will touch each ...