EXAMPLE 7.6.1. ESTIMATING TIE WIRE FOR CHB REINFORCEMENT

From the previous example of a 4.0m x 3.0m wall, estimate the tie wire required in kilograms.

From the previous example: 

      Vertical reinforcement spacing: 80cm

      Horizontal reinforcement spacing: at every 3 layers

Tie wire estimation can be done in two ways:

a. Direct count. identify the number of intersections created with the vertical and horizontal reinforcements.

   From previous results: 5 horizontal layers of 4m
                                     5 vertical layers of 3m

      


Because CHB reinforcement only uses D10mm rebars, the applicable length of tie wire needed is 25cm.





b. Block method. Using a table, determine the weight of tie wire needed.


   

   Use the table with 25cm tie wire:


  





Back to 7.0. Estimating Concrete Reinforcement