The limiting length of an offset does not depend upon-a)accuracy of t...
The allowable length of offset depends upon the degree of accuracy required, scale, method of setting out the perpendicular, and nature of the ground.
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The limiting length of an offset does not depend upon-a)accuracy of t...
Limiting length of an offset
The limiting length of an offset is the maximum distance that can be measured perpendicular to a line or a curve. It is an important factor to consider when surveying, as it determines the accuracy of the work and the method of setting out perpendiculars.
Factors affecting the limiting length of an offset
There are several factors that can affect the limiting length of an offset, including:
1. Accuracy of the work
The accuracy of the work is one of the most important factors that can affect the limiting length of an offset. If the work is not accurate, the offset may not be perpendicular to the line or curve, which can result in errors in the measurement.
2. Method of setting out perpendiculars
The method of setting out perpendiculars is another important factor that can affect the limiting length of an offset. There are several methods that can be used to set out perpendiculars, including the 3-4-5 method, the right-angle method, and the diagonal method. Each method has its own advantages and disadvantages, and the choice of method will depend on the specific requirements of the survey.
3. Scale of plotting
The scale of plotting can also affect the limiting length of an offset. If the scale of plotting is too small, it may be difficult to measure the offset accurately, which can result in errors in the measurement. On the other hand, if the scale of plotting is too large, it may be difficult to plot the offset accurately, which can also result in errors in the measurement.
4. Indefinite features to be surveyed
Finally, the presence of indefinite features to be surveyed can also affect the limiting length of an offset. Indefinite features are features that are not clearly defined, such as a riverbank or a tree line. These features can make it difficult to set out perpendiculars accurately, which can result in errors in the measurement.
Conclusion
In conclusion, the limiting length of an offset is an important factor to consider when surveying. It is affected by several factors, including the accuracy of the work, the method of setting out perpendiculars, the scale of plotting, and the presence of indefinite features to be surveyed. By taking these factors into account, surveyors can ensure that their measurements are accurate and reliable.