FIRTH . CO . NZ
KEYSTONE ® KEYSTEEL ® SYSTEM WAS USED IN THE CONSTRUCTION OF RETAINING WALLS ALONG THE WAIKATO EXPRESSWAY PROJECT .
This highly effective commercial retaining system from Firth has been designed specifically for use with highway and heavy construction projects . It combines the ease of construction of a segmental block retaining wall system with the performance of traditional large panel MSE retaining .
The semi-flexible MSE system handles seismic events better than more rigid systems . It has a proven seismic record , withstanding seismic events without failure or significant detrimental effects on wall structure .
For this project , Firth ’ s Keystone ® system has resulted in an aesthetically appealing , cost-effective retaining wall structure .
PROJECT SPECS :
Firth supplied approx . 8300 cubic metres of Firth Certified Concrete . Keystone ® retaining blocks were constructed to a 30Mpa compressive strength with 3 colours in the straight face module . The Firth Keystone ® Keysteel ® ladder system was combined with a modified Keysteel ® ( no recess ) module . The Keysteel ® mould was modified to allow tighter radius curves .