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POLY-QUAL (INDIA) PVT.LTD . ENGINEERS  ٠ TOWER MANUFACTURERS  ٠ ERECTORS A-210, OKHLA INDUSTRIAL AREA, PHASE – I, NEW DELHI – 110020, INDIA Tel. : +91-(011) 26817236, 26814137  Fax : +91-(011) 26812231, 26811397 Email:  [email_address]  Website:  httpwww.polyqual.com
Buying a Telecommunication Tower Tower is a Capital expenditure with operational life of several decades. Hence  buying a tower needs careful determination of requirements or specifications. Important specification include 1. Survival wind Speed.  2. Physical size, Type, Number and levels of Antennas. 3. Twist & Sway requirements. While offering a product, almost all bidders, uniformly say “Complied” against all the required specifications including above i.e. wind speed, antenna loading etc. While compliance for some of the specifications is easily confirmable, the requirement of wind speed and antenna loading cannot be checked without looking into  detailed design calculations . Hence experienced and shrewd buyers always insist on design calculations, before finalization of purchase contract.  Unfortunately these two parameters are main parameters, which determine suitability of tower and are responsible for cost of tower also. Factors like size of antennas, type of antenna, level of antenna have considerable effect on the required strength (read cost) of tower. Placing antenna at mid height of tower will reduce the loading on tower by 50%. On the other hand, if the wind speed is double, the forces acting on tower are 4 times. Buying a communication tower is not the same as buying a bunch of steel angle, pipes, plates etc. Tower is matched set of its various components.
Each component of this set has a vital role to play in the strength of WHOLE tower, for example, if One small segment of the leg is slightly weaker than required, that the entire tower’s strength will be determined by this small component, because tower will fail from this point only when full loading occurs. Moreover, putting extra strength at any non-required point is wastage of materials, because strength of the tower is determined by weakest link in the structure only. Hence it becomes imperative that all members should be capable of resisting the applied loads to the same extent uniformly. To ensure that all these things have been considered properly, availability of design competency with the tower supplier is the most desirable eligibility criterion.  Design competency in supplier is a must for copying also. For example, if bolt grade changes, the joints have to be redesigned. If any member is replaced due to non availability of any section then also detailing of all adjoining members has to be changed. Approx.95% of price paid by buyer for tower, consists of materials cost. In  today’s competitive world, all bidders work  on small margins.  Hence material cost is the all encompassing component of total cost. Anybody can reduce  the cost by reducing the materials. That reduction is  normally not without  compromising on the performance or strength. The buyer has no way to  recognize this  compromise without looking into detailed calculations  and  verify  that the product is as per design calculations.
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Materials Used Our tower designs  are based  on strengths of Indian Steels.  Certificate from a Govt. approved test laboratory certifying  the  strength  of  material  is  as  specified  in  design,  can  also be provided with  material supply.  All materials  are hot  dip galvanized  after  fabrication. The length of all members  is maintained less than  6 meters,  so that transportation of  material by truck or containers is not a problem. Fabrication of Tower Materials Tower material is fabricated using precision machinery.  Accuracy of all  drilled or punched holes  are  maintained  as  per engineering drawing. Buyer can choose any type of tower. Each  type  will  be  guaranteed  to  meet  the  performance  specifications  laid out by buyer. The design  will be certified  to meet the performance requirements by chartered  engineer   /Govt. Approved Authority. Certificates, showing.  ●   The strength of materials as per design. ●  Thickness of zinc coating as per standards will be enclosed  with supply of materials, if desired. ● An erection manual, showing location of all members & their  code is provided, when only tower materials are ordered. All members in the supply carry code in permanent punch and permanent ink as per erection manual.
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telecommunication Towers

  • 1. POLY-QUAL (INDIA) PVT.LTD . ENGINEERS ٠ TOWER MANUFACTURERS ٠ ERECTORS A-210, OKHLA INDUSTRIAL AREA, PHASE – I, NEW DELHI – 110020, INDIA Tel. : +91-(011) 26817236, 26814137 Fax : +91-(011) 26812231, 26811397 Email: [email_address] Website: httpwww.polyqual.com
  • 2. Buying a Telecommunication Tower Tower is a Capital expenditure with operational life of several decades. Hence buying a tower needs careful determination of requirements or specifications. Important specification include 1. Survival wind Speed. 2. Physical size, Type, Number and levels of Antennas. 3. Twist & Sway requirements. While offering a product, almost all bidders, uniformly say “Complied” against all the required specifications including above i.e. wind speed, antenna loading etc. While compliance for some of the specifications is easily confirmable, the requirement of wind speed and antenna loading cannot be checked without looking into detailed design calculations . Hence experienced and shrewd buyers always insist on design calculations, before finalization of purchase contract. Unfortunately these two parameters are main parameters, which determine suitability of tower and are responsible for cost of tower also. Factors like size of antennas, type of antenna, level of antenna have considerable effect on the required strength (read cost) of tower. Placing antenna at mid height of tower will reduce the loading on tower by 50%. On the other hand, if the wind speed is double, the forces acting on tower are 4 times. Buying a communication tower is not the same as buying a bunch of steel angle, pipes, plates etc. Tower is matched set of its various components.
  • 3. Each component of this set has a vital role to play in the strength of WHOLE tower, for example, if One small segment of the leg is slightly weaker than required, that the entire tower’s strength will be determined by this small component, because tower will fail from this point only when full loading occurs. Moreover, putting extra strength at any non-required point is wastage of materials, because strength of the tower is determined by weakest link in the structure only. Hence it becomes imperative that all members should be capable of resisting the applied loads to the same extent uniformly. To ensure that all these things have been considered properly, availability of design competency with the tower supplier is the most desirable eligibility criterion. Design competency in supplier is a must for copying also. For example, if bolt grade changes, the joints have to be redesigned. If any member is replaced due to non availability of any section then also detailing of all adjoining members has to be changed. Approx.95% of price paid by buyer for tower, consists of materials cost. In today’s competitive world, all bidders work on small margins. Hence material cost is the all encompassing component of total cost. Anybody can reduce the cost by reducing the materials. That reduction is normally not without compromising on the performance or strength. The buyer has no way to recognize this compromise without looking into detailed calculations and verify that the product is as per design calculations.
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  • 10. Materials Used Our tower designs are based on strengths of Indian Steels. Certificate from a Govt. approved test laboratory certifying the strength of material is as specified in design, can also be provided with material supply. All materials are hot dip galvanized after fabrication. The length of all members is maintained less than 6 meters, so that transportation of material by truck or containers is not a problem. Fabrication of Tower Materials Tower material is fabricated using precision machinery. Accuracy of all drilled or punched holes are maintained as per engineering drawing. Buyer can choose any type of tower. Each type will be guaranteed to meet the performance specifications laid out by buyer. The design will be certified to meet the performance requirements by chartered engineer /Govt. Approved Authority. Certificates, showing. ● The strength of materials as per design. ● Thickness of zinc coating as per standards will be enclosed with supply of materials, if desired. ● An erection manual, showing location of all members & their code is provided, when only tower materials are ordered. All members in the supply carry code in permanent punch and permanent ink as per erection manual.
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