A Comparative Cost Analysis Between FlexLock and Standard CMU Masonry

The FlexLock Wall System

The FlexLock Wall System

Cost Analysis

Cercorp Initiatives Inc.

Developing Innovative Solutions in the Building Industry

ST = NT (1+A) ST = Standard Time

NT = Normal Time

A = Allowances (expressed in a percent)

ST = NT (1+A)

22 = 20 (1+ 0.10)

Based on Standard Time, it takes 22 second to stack one FlexLock Unit. This equates to 164 block an hour. However, given normal physical constraints of a construction worksite, it is more reasonable to hold a production rate of 120 units an hour or the stacking of one unit every 30 second. Keep in mind that each of the stackers are supported by one laborer whose only task is to place block no less than ten feet from any point. Since there is no real difference between a stacker and laborer, they can trade-off if fatigue sets in. Because this was the first FlexLock structure, and because the crew was not FlexLock certified, the lack of experience in material handling and training resulted in considerable time loss. As a result, the labor productivity rates for this first project were reduced significantly. Still, this is substantially faster than standard masonry by over 100%. Moreover, the stackers (which were comprised of day laborers) represented a substantial reduction in labor costs. Both profit and productivity will increase as greater efficiency is grained.

III. Conclusion

Relevant Effect of FlexLock Technology: Based on a comparative cost analysis of the structure, and using the installed cost of standard 8" masonry in the region, the total masonry costs for the FlexLock structure decline by 24% and productivity increased by two-fold. This analysis incorporates fair market value of the resources for the specified project. Any changes in fair market value will result in different estimates of the cost change. The conclusion of this analysis is valid for this project only and may not be used out of
the context presented herein.