Technical Specification of Roof Top Tower of 12, 15, 18 & 21m height

1.0 Introduction
Chapter-1
General Specifications
This document contains the generic requirements of self supporting type 21, 18, 15 & 12
m Roof Top Towers for Cellular wireless systems. The towers shall be of angular
construction in segments of 3m with a square base. The towers shall be four legged and
able to support the loading of the antennas as given below:
a. 2 Nos. of 1.2m diameter Solid antenna at 2.0m from the top of tower.
b. 4 Nos. of 0.6m diameter Solid Antenna at 2.0m from the top of tower.
c. 6 Nos. of panel antennas for cellular wireless systems (2600X262X115) weighing
50Kg, 1m from the top of tower.
1.1 Other parameter for designing of towers shall be as under
a. Factor of Safety = 1.5
b. Basic Wind Speed = 180 Km/hr
c. Terrain Category = 2
d. Building Height = 10m
e. Tower twist and sway is found to be less than 0.5 deg @ 75% of basic wind speed.
2.0 Detailed Technical Requirements
2.1 Type of Tower
4 legged self supporting type with square base & Angular construction in segments of
3m. The details are indicated in drawing of tower.
2.2 Foundation
Beams shall be cast after connecting re-enforcement of the beams to the existing columns
of the structure. Foundation bolts shall be placed in the beams using templates
corresponding to the tower height. The columns and beams shall be RCC (M20). The
existing columns shall be surveyed for the requisite capacity to carry the tower loads and
the weight of the beams. Non-galvanized steel structures such as Anchor bolt etc. should
be painted with red oxide coating. The base plates shall be galvanized as some of their
portion may be directly exposed to environment.
The foundation design/drawings of towers, given in the specifications UTL/RTT/02-01
OCT 2011 and UTL/RTT/01-02 OCT 2011 may be considered for reference and actual
foundation design/drawing shall be as per the actual site requirements.
UTL/RTT/02-01 OCT 2011 Page 4 of 31