Empirical Determination Of Labour Output For Floor Screed And Tile Finishes For Construction Work

Empirical Determination Of Labour Output For Floor Screed And Tile Finishes For Construction Work

abstract

There’s dearth of information on affair position of erecting operatives in Nigeria, accordingly, the affair constants presently used for medication of construction estimates are remnants of British social heritage or deduced from untested gests . thus this study aims at empirically determining affair constants for bottom homestretches( screeds and penstocks) for structure design in Abuja. The objects are to identify the productivity factors related to Building Engineering Standard Method of Measurement 3( BESMM3) and evaluation of their impact on the labors of five work particulars of bottom homestretches. The procedure espoused field check involving work dimension to observe and measure operatives affair. Data was collected from 80 on- going construction spots with an normal of 50 gangs of workers for each work item to establish the ensuing average labors per day; 25 mm thick cement and beach screed(23.70), 44 mm thick cement and beach screed(19.31), 400 X 400 mm ceramic bottom pipe(27.38), 300 X 600 mm ceramic bottom pipe(30.18) and 300 X 300 mm ceramic bottom pipe(23.61). The study also revealed a significant difference on mode of employment and period of observation on the labors of the workers. The results suggest that experience and concession as mode of employment affect affair of workers to varying degrees grounded on the consistence of bottom screed and unit area of bottom pipe. The study has recommended that the established affair should serve as an effective birth for effective estimating process and be in compliance with the BESMM conditions.

Chapter One

Preface

Background of the Study

The source of labour affair used for estimation of construction cost has been a point of converse and contention. This is because this involves the quantitative estimation of the labour rates while request check exploration for accoutrements prices are the base for the material cost estimation( Ashworth, 2002). The high degree of trip set up in BOQ estimates is substantially attributed to the query of the delicacy of the labour constants used in pricing labour costs. Ajia( 2002) concluded that while utmost of the labors used by estimators are the British began constants, some contractors borrow labors gotten from their experience and hencenon-uniform labors are extensively in use.

The common system of generating cost estimates for construction systems involves the addition of unit rate by the measured amounts in the bill of amounts( Ashworth, 2002). The unit rate is a element of labour rate( gain from the addition of labour constant by all- in rate) plus cost of material and chance allowance for profit and outflow, while the measured amounts are attained from delineations and specifications for the workshop rules specified by Building and Engineering Standard styles of Measurement( BESMM). The inconsistency in operation of a defined affair constant for construction estimates has posed a serious challenge to the delicacy of estimates reckoned by volume surveyors.

Labour being one of the important factors of the construction assiduity productivity represents a considerable proportion of the final cost generally counting for between 40 to 60 of erecting cost( Abdullahi etal., 2010 and Butchan etal., 1993).