Tiller Engineering - Trust in Strength

Bell Canada – Eastern Canada

Odyssey - HPSA Build

Client: Bell Canada
Location: Ontario & Four (4) Atlantic Provinces
Date of Completion: November 2009
Project Maintenance/Construction Cost: Unknown

Scope of Work:
Antenna mount design, structural analysis, reinforcing design, installation packs, tower mappings, installation inspections, and project management.

Description:
Bell implemented a new HSPA cellular system across Eastern Canada starting in 2008. All work was completed in accordance with CSA S37-01 Standards – Antennas, Towers and Antenna Supporting Structures. Our team completed all inspection tasks in accordance with CSA S37-01 Appendix D Recommendations for Maintenance

Project Preparation:
TEI was involved from the start with Bell to coordinate logistics, project management, and system design in order to maximize available space and loading on existing towers.

Field Inspection and Structural Mapping:
The towers were given a detailed inspection by our field team as per Appendix D of CSA S37-01. The following items were inspected:

  • Type and age of tower, field measurements/mapping
  • Coordinates of tower
  • Visual examination of tower members and connections
  • Visual examination of ladders, gratings and handrails
  • Visual examination of safety rails and anti-climbs
  • Foundations (visible portions)
  • Antennas and other appurtenances
  • Tower alignment
  • Tower verticality and twist
  • Waveguide bridging
  • Transmission lines
  • Grounding
  • Electrical and lighting installation
  • Painting and galvanizing
  • General comments

Structural Analysis:
A Structural Analysis was conducted to the requirements of CSA S37-01 using site-specific environmental loadings provided by Environment Canada and approved by the owner. The analysis was performed using the industry standard software GUYMAST in conjunction with TS Tower finite element package. New custom antenna mounts (pinwheels) were successfully designed to fit the widest variety of towers possible.

Reporting:
Installation packs for antennas, mounts and TX lines were developed for contractors to bid on and install. Likewise, scope of work documents for tower reinforcing were designed and drawn-up for contractors in instances where upgrades were required for towers to support the new loading.