Design forms for 13’-8” high wall to be concreted at the rate of 5 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°F. The unit weight of concrete is 150 pcf with a slump of 3.75 inches. The forms will be used only once, so short-term loading stresses will apply. Use form grade plywood sheathing 7/8 in. thick in 5×10-ft sheets, and 5,250-lb coil ties are on hand. Framing lumber of No. 2 Douglas Fir-Larch is to be purchased as required.

The compressibility of water  is 4.4 x 10-10 Pa-1. The compressibility  for clay, gravel and granite are approximately 10-6, 10-8, and 10-10 Pa-1, respectively. What is the percentage of water released from storage due to decompression of the aquifer skeleton and due to decompression of water for a clay, gravel and granite confined aquifers? The porosities are 35%, 25%, and 1% for clay, gravel and granite aquifers, respectively. The aquifers have a similar thickness of 20 m and cover a land area that has a length of 80 km and width of 125 km. How much water will be released from each aquifer, in m3 and in km3, if the head in the aquifers dropped by 5 ft?

A present asset (defender) has a current market value of $85,000 (year 0 dollars). Estimated market values at the end of the next three years, expressed in year 0 dollars, are MV1= $73,000, MV2 = $60,000, MV3 = $40,000. The annual expenses (expressed in year 0 dollars) are $15,000 and are expected to increase at 4.5% per year. The before-tax nominal MARR is 15% per year. The best challenger has an economic life of five years and its associated EUAC is $39,100. Market values are expected to increase at the rate of inflation which is 3% per year. Based on this information and a before-tax analysis, what are the marginal costs of the defender each year and when should you plan to replace the defender with the challenger?

1. Match the lumber column section to their appropriate size factor (Cf)

   -       A.       B.       C.       D.       E.       F.       G.    8x10 Eastern White Pine Select Structural       -       A.       B.       C.       D.       E.       F.       G.    4x6 Hem-Fir No 1       -       A.       B.       C.       D.       E.       F.       G.    2x4 Douglas Fir Larch No 2       -       A.       B.       C.       D.       E.       F.       G.    12x12 Northern Pine Select Structural       -       A.       B.       C.       D.       E.       F.       G.    4x4 Western Cedar No 1

   A. 1.15 B. 1.1 C. 1.0 D. 1.4 E. 1.3 F. 1.2 G. 1.05

5 points   

QUESTION 2

1. "A 12ft tall column is made of 4x8 Douglas-Fir-South #1 wood. If the column is pinned (hinged) at both ends, calculate the service load capacity, in whole pounds, of the column. Assume normal temperature and moisture conditions."

1 points   

QUESTION 3

1. "A 12ft tall column is made of 5x5 Hem-Fir #2 wood. If the column is pinned (hinged) at both ends, calculate the service load capacity, in whole pounds, of the column. Assume normal temperature and moisture conditions."

1 points   

QUESTION 4

1. "An 18ft tall column is made of 4X6 Douglas-Fir-South Sel Struct wood. If the column is braced half-way on its weak axis and its hinged on both ends, calculate the column service load capacity. Assume normal conditions."

1 points   

QUESTION 5

1. "An 18ft tall column is made of 6x8 Douglas-Fir-South #1 wood. If the column is braced half-way on its weak axis and its hinged on both ends, calculate the column service load capacity. Assume normal conditions."

Hello guys, this is a question scenario regarding a construction safety class, under the civil engineering program, in advance thanks.

1. When, what and who should investigate accidents and why should they be investigated?
2. Robert Martin and Andrew Morgan are construction superintendents for Baker Construction Company (BCC). The home office for BCC is in Orlando, Florida, but the company has projects in 12 states. Each project has its own superintendent. Martin and Morgan are attending a quarterly meeting at the home office with all of the company’s construction superintendents. During a coffee break earlier in the day, they had gotten into a debate over the need for emergency plans. Martin summarized his point of view as follows: “Emergency planning is a waste of time and scarce resources. Chances are less than one in a thousand that an emergency will even occur. But if an emergency situation does occur, all we have to do is call 911.” Morgan disagreed. He summarized his point of view as follows: “We need to have a comprehensive plan for emergency response that is standardized company-wide and that can be easily customized for each job site. Furthermore, we need to drill our employees in the proper execution of the plan until the proper emergency response becomes automatic.” Join this debate. Who is right? Why?

what is absorption technique in mining wasterwater treatment ?
What are the Floating Adsorbents for In Situ Treatment of Wastewater in Mine Tailing Ponds

Design a non‐air‐entrained concrete mix that will have a slump of 3 4" and a design strength (f′c) of 4300 psi using the absolute volume method. Assume the following agg egate properties:
Natural Sand Fineness modulus = 2.90 Absorption = 1.25% Bulk relative density = 2.55 Dry‐rodded unit weight = 106 lb/ft3
Gravel w/ some crushed particles NMAS = ¾" Absorption = 0.95% Bulk relative density = 2.66 Dry‐rodded unit weight = 99 lb/ft3
Don’t forget to adjust the water content for the shape of the coarse aggregate. Also, make sure you add enough extra water to your mix design the make the aggregate SSD (but you don’t know the moisture content of the aggregate yet, so ignore the last two parts of Step 10). Do all calculations based on a cubic yard of concrete.

2. Construction debris is a major issue in landfills and environmental engineering. Determine the construction debris policies for construction permit holders in terms of construction debris?

a. what are the requirements in each city for construction permit holders in terms of construction debris?

b. What are three different ways that someone can meet the reuse or recycle requirements?

Explain the phenomenon of (a) Creep and (b) Relaxation in materials. Show stress versus time and strain versus time response for both phenomena. How will you calculate the creep and relaxation modulus?

A. Discuss which specific sector of crucial infrastructure you think is least critical and why (example: chemical, commercial, communication, dams, emergency services, energy, food & agriculture, healthcare, IT, nuclear reactors, transportation, waster & waste?)

B. Discuss what sectors you think to be present within your neighborhood & provide examples.

Can anyone explain the relationship between those factors and Non-aqueous phase liquids (NAPL)?

Density, Interfacial tension, Residual saturation, Partitioning properties, Solubility Volatility and vapor density; Permeability, Pore size, Structure

For instance, when those factors increase, what happens to the transportation rate of NAPL? increase or decrease? I know when density increase, the rate should also increase.

1) write a review report on the topic Effects of climate change on hydro power generation.(1500 words).

In a one-dimensional consolidation test the time required for 50% consolidation has been measured as 154 seconds. The settlement of the sample at the end of the test was 2.5 mm.

a) Assume that Tv for 90% consolidation is equal to 0.848 and Tv for 50% consolidation is equal to 0.197. Also recall that Tv = (cv.t)/d2. Determine the time required to achieve 90% consolidation.

b) For the same experiment, assuming double drainage (i.e. open layer/permeable boundaries) and knowing that s'0 = 60 kPa, s'1 = 120 kPa, e0 = 0.65 and H0 = 20 mm determine the coefficient of permeability (k) in m/s.

Recall that S = mv.H0.Ds' and that k = cv.mv.gw

c) How long would it take to achieve 90% consolidation for the same soil on a layer with single drainage (i.e. closed layer) with a thickness of 10 m? Please provide your answer in years

d) What would you expect to happen to (i) the coefficient of volume compressibility mv, (ii) the permeability k, and (iii) the time to reach 90% consolidation t90 if it was decided to build (in the field) an embankment twice as heavy as initially expected? (i.e. consider that s'1 = 240 kPa). Calculations are not necessary to justify your answer. You must explain your answer in terms of physical phenomena (i.e. what the soil “feels”).

e) What are vertical drains? How can they be used in the field to accelerate consolidation time? Why do they work? Answer succinctly and use as many sketches as necessary to explain your answers

1) Explain SIDRA network development in detail?

2) How can we achieve best platoon ratio in sidra intersection networking?