TEMCO specialises in the replacement of tower steel and the refurbishment of directly buried steel foundations.
Steel: Techniques have been developed for replacing legs and significant load pieces without the use of external machinery. Conductor loads are transferred and supported to allow the replacement of crossarm steel. Tasks undertaken include the insitu replacement of 220 kV strain underchannels under live conditions.
Foundations are exposed utilising small excavators and hand methods where appropriate. Calculations to determine foundation loadings indicate where tower propping is necessary. TEMCO uses the following procedure to upgrade foundations:
TEMCO is also involved in condition assessment
- Prop the tower leg.
- Excavate tower leg to the required depth.
- Rusty foundation steel is sand blasted to a SA2.5 finish.
- Splint holes are marked and drilled in the newly cleaned surface.
- Hot zinc is sprayed over the cleaned surface.
- The splints are fitted and tightened.
- The entire exposed surface has a sealer applied.
- The excavation is filled, compacted and the site left.
