How to measure the height of the span.
In construction engineering, the height of the span is an important parameter, which affects the safety and stability of the building. Therefore, accurate methods are required for the measurement of spans. This article will explain the definition of a span and how to measure it.
1. Definition of spanning.
Span height is the ratio of the distance between two support points in a building to the vertical height. This ratio varies from building to building and needs to be measured on a case-by-case basis.
2. Commonly used cross-height measurement methods.
Direct measurement method.
For some small buildings, the direct measurement method can be used to measure the span height. This method is relatively simple and only requires the use of a measuring tape or laser rangefinder to make measurements. However, it is important to note that due to the limited height of the person and the length of the measuring tape, this method is only suitable for smaller buildings.
Trigonometric method.
For some tall buildings, the trigonometric method can be used to measure the span height. This method involves measuring the angle and distance of the building using a measuring instrument such as a total station or theodolite, and then using trigonometric functions to calculate the height of the span. This method is more accurate, but it requires a professional surveyor to operate.
Photogrammetry.
With the development of photographic technology, photogrammetry has also become a commonly used method of cross-height measurement. This method requires the use of photographic equipment, by photographing the ** of the building, and then using image processing technology to calculate the height of the span. This method is simple and fast, but requires the use of expensive photographic equipment.
In conclusion, the measurement of span heights requires the selection of the appropriate method according to the specific situation. When choosing a measurement method, factors such as the size, height, and topography of the building need to be considered, as well as factors such as measurement accuracy and cost.