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What is Gantt Chart

Posted by Civil Engineer Expert On July - 25 - 2009

25 7 11 150x150 What is Gantt ChartThe chart is named after Henry Laurence Gantt, who refined the concept of using a bar chart to control steps relevant to the process of shipbuilding.

The Gantt chart is a type of bar chart that is helpful in laying out the tasks associated with a given project. When executed properly, the Gantt chart helps to ensure that the project schedule is maintained at a reasonable pace, and that the individual tasks that make up the work breakdown schedule logically progress in a manner that moves the project closer to completion. A Gantt chart can be used for just about any type of project, from laying out a marketing strategy or planning a building project.
The chart is named after Henry Laurence Gantt, who refined the concept of using a bar chart to control steps relevant to the process of shipbuilding. During the 20th century, the essentials of his process chart were applied to projects that had nothing to do with the building of ships. Today, the Gantt chart is used to establish a precedence network that determines the priority level of each task associated with the project. At the same time, the chart also evaluates the dependency relationships of each of the tasks. Together, these two aspects of the Gantt chart make it possible arrange and project the completion time of various tasks in a manner that shows a logical progression toward the successful completion of the project.

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Foundations for Risk Management

Posted by Civil Engineer Expert On July - 24 - 2009

24 7 34 150x150 Foundations for Risk ManagementThe Foundations for Risk Management presented herein will be the basis for the tools and other content that the Risk Management Program committee will deliver at the upcoming convocation.

These Foundations were developed by engineers in private practice to help engineering firms focus their practice on avoiding and minimizing risk.
The first five Foundations deal with the process of the engineering business and the last five deal with project management.

1. Culture

Create a culture of managing risk and preventing claims
Creating a culture of risk management and claims prevention entails instilling in your company an overriding vision that stresses quality control and managing risk as a vital part of your business practice.
This vision must become a core value of the firm and come from the top down. Stress the importance of risk management as often as possible among the staff, as well as the consequences of ignoring it. Creating this culture requires both strategic and operational planning. It should involve all levels of the staff and even involve clients. Quality must take precedence over profits. When quality is established, profits tend to follow.

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Construction Contract

Posted by Civil Engineer Expert On July - 24 - 2009

The term Contract used in the Construction management can be defined as: “An agreement entered into by two parties under the terms of which one party agrees to perform a specific job for which the other party agrees to pay.

Definition of a construction contract

The term Contract used in the Construction management can be defined as: “An agreement entered into by two parties under the terms of which one party agrees to perform a specific job for which the other party agrees to pay. Contract documents attached to and/or stated in the agreement form integral parts of the contract”.

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Roof slope to prevent ponding

Posted by Civil Engineer Expert On July - 24 - 2009

Roof beams should have a continuous upward slope equivalent to 1/ 4 in/ft (20.8 mm/m) between a drain and the high point of a roof, in addition to minimum recommended camber to avoid ponding. When flat roofs have insufficient slope for drainage (less than 1 /4in/ft) (20.8 mm/m)

The stiffness of supporting members should be such that a 5-lb/ft2 (239.4 N/mm2) load causes no more than 1 /2 -in
(12.7-mm) deflection.
Because of ponding, snow loads or water trapped by gravel stops, parapet walls, or ice dams magnify stresses and deflec- tions from existing roof loads by

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Recommendations

Posted by Civil Engineer Expert On July - 24 - 2009

Columns are divided into three categories, short, intermediate, and long. Let K denote a parameter defined by the equation

RECOMMENDATIONS OF THE FOREST PRODUCTS LABORATORY

The Wood Handbook gives advice on the design of solid wood columns. (Wood Handbook, USDA Forest Products Laboratory, Madison, Wisc, 1999.)

Columns are divided into three categories, short, intermediate, and long. Let K denote a parameter defined by the equation

K=0.64(E/fc)1/2

The range of the slenderness ratio and the allowable stress assigned to each category are next.

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Beams

Posted by Civil Engineer Expert On July - 24 - 2009

23 7 43 150x150 Beams The extreme fiber stress in bending for a rectangular timber beam is

f=6M / bh2 =M/S

A beam of circular cross section is assumed to have the same strength in bending as a square beam having the same cross-sectional area.
The horizontal shearing stress in a rectangular timber beam is

 

H=3V /2bh

For a rectangular timber beam with a notch in the lower face at the end, the horizontal shearing stress is

H=(3V /2bd1) (h / d1)

A gradual change in cross section, instead of a square notch, decreases the shearing stress nearly to that computed for the actual depth above the notch.
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Soil Testing and Fertility Evaluation

Posted by Civil Engineer Expert On July - 24 - 2009

23 7 42 150x150 Soil Testing and Fertility Evaluation At this time of the year it is good for growers to review their records concerning soil test information for the fields on their farm.

Soil samples should be taken at least every three seasons, unless specific problems are being experienced that would indicate any difficulties associated with fertility, salinity, sodium, or drainage problems which would require more frequent and detailed soil sampling. So if soil samples are needed, and have not been taken yet, there is still time before the start of the 1999 season to get this taken care of.

When collecting soil samples, soil cores should be taken from a depth of at least 6 inches. However, due to the irrigated nature of Arizona fields, it is recommend that the top 12 inches be sampled for most cases. Since it is important to develop an assessment of the residual NO3–N (nitrate -N) concentrations in the soil which can be available to the next crop, it is even more important to sample the top 12 inches and even the top 24 inches if at all possible.

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