DESIGN AND DETAILING OF FOUNDATION FOR A ROOF TOP TELECOMMUNICATION TOWER

Roof Top Towers in Telecommunication

Normally in telecommunication tower construction, there are different types of towers design & built in the world depending on the height, location, weight of antennas or some other factors. Normally the towers ranging from 6m to 80m or more. The smaller towers like 6m - 12m basically design as poles (cylindrical sections/ tubes with a foundation) which erected on roof tops of buildings or other possible locations mainly in urban areas. And 12m - 30m smaller towers which also erected on top of roof of buildings. 30m and above are normally constructed as Greenfield towers, except other than in special cases.

A roof top tower is basically supported on the beams/ columns in the existing structure of the building with minor modification or strengthening and transfers load to the existing foundation of the building. Hence it is very critical to understand that the building is having sufficient capacity to hold the additional weight induced by the tower.

Foundation of a rooftop tower will mainly connected to the existing building by the means of Chemical Anchoring (Hilti Hit RE 500 or other products can use).

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BORED AND CAST IN SITU PILES

Bored and cast in-situ piles or bored & cast in place piles carries the process of installation in the name it self. A bored and cast in-situ pile is installed by boring the soil and or rock using heavy machinery and pouring concrete to the bored hole with or without steel reinforcement. Figure: Rotary drilling machines in the process of pile boring You can watch the detailed process in video form the following link https://www.youtube.com/watch?v=u6YGxSzvmKo You can check more details from the following link MOS for Bored Cast In situ Pile Installation https://engcivilstuff.blogspot.com/2020/03/bored-piling-installation-by-rotary.html

MOCK UP TEST FOR LARGE CONCRETE POURS - TEMPERATURE MONITORING

Mass concrete is defined as "any volume of concrete with dimensions large enough to require that measures be taken to cope with the generation of heat from hydration of cement and attendant volume change to minimize cracking." [ ( ACI Committee 207–Mass and Thermally Controlled Concrete ) Mass concreting can result in high temperatures in concrete core during hydration process. Which can result thermal cracking of concrete in a severe way. Basically the temperature variance (in different locations of the concreted element) or the temperature gradient will cause the thermal cracking.

BOQ FOR A GRIENFIELD TELECOMMUNICATION TOWER CONSTRUCTION

Bill of Quantities for a Tower Construction A BOQ for a telecommunication tower use for Civil Engineering works is shown in figures below. Normally in a construction of a telecommunication tower, the Civil work contractor has to undertake site clearance, access road preparation, fencing, plinths for other equipment like BTU or generators, Meter compartments if any, Foundation of tower, etc. and the installation of tower by using Rigger teams.

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