Analysis of Rates Knowing Cost of Material Unit 2 Part 1

Que2.1. What do you understand by ‘ analysis of rates ’? What  are purposes of rate of analysis? 

Answer  1. The  system of determination of rate per unit of a particular item of  work considering the cost of amounts of accoutrements , the cost of labours,  hire of tools and  shops, overhead charges, water charges, contractors  profitetc., is known as rate analysis or analysis of rate. 

2. Rates of accoutrements  are  generally taken as the rates delivered at the  point of  work and include the first cost( cost at origin), cost of transport,  road  freight( if any),  leviesetc. 

3. still,  further than 8 km,  If the accoutrements  are to be carried from a distantplace.additional cost of transport may be added. 

4. A contractor’s profit is added on all  particulars of the particular work which  have been arranged by him. 

Purposes of Rate Analysis The purposes of rate analysis are as  follows 

1. To determine the current rate per unit of an item of work at the  position.  2. To examine the viability of rates quoted by contractors.

3. To ascertain the  volume of accoutrements  and labour strengths  needed to  complete the  design. 

4. To revise the schedule of rates due to increase in the cost of accoutrements   and labour or due to changed situations. 

Que2.2. Give the factors which affect the analysis of rates. 

Answer  Factors Affecting Rate Analysis entourages are the factors that  affect the rate of a particular item of work 

1. Specifications of  workshop and accoutrements , quality of accoutrements , proportion of   blend,  system of constructional operationetc. 

2. Amounts of accoutrements  and their rates. 

3. Number of different types of labour and their rates. 

4. position of  point of work and its distance from the sources of accoutrements   and rates of transport. 

5. Vacuity of water. 

6. eclectic and overhead charges of contractor. 

7. point conditions and the associations. 

Que2.3. bandy in detail procedure to fix up rates per unit of an  item. 

Answer  1. The following information are  needed to fix up the rate for unit of an  item  Out- turn or Task. 

ii. Estimation of labour. 

iii. Accoutrements for different  particulars of work. 

iv. Current rate of accoutrements . 

Current rate of labour of different  orders. 

2. The analysis of rate is done for unit  volume of an item of work. 

3. Details of  colorful accoutrements  and labour are worked out and added together  to get the total cost of accoutrements  and labour. 

4. This will also include  eclectic and T and P cost. To this  1  1  2  of it  is added for water charge( only in those  particulars which bear water in  any way). 10 contractor’s profit is also added. 

5. The  totality all these costs is known as rate of unit  volume of an  item.  Analysis of Rates, Specification & Tenders.

Mathematically  Let cost of accoutrements  for unit item =  x  ii. Let cost of labourers, T and P and sundries =  y  iii. Cost of material and labour = ( x y)  iv. Add  1  1  2  for water charge =   )  100  x y  Total cost with contractor profit( =  10) =   10 ) 1  100 100  x y  vi. Rate for unit of the item = 1.115( x y) 

Que2.4. Explain the labour  demand for different  workshop  according to National Building Code. 

Answer  Channel per28.30 cu m( 1000 cu ft) 

1. Excavation in foundations,  fosses,etc. in ordinary soil including disposal  up to 30 m( 100) and lift of1.5 m( 5 ft) – 5 Beldars and 4 Mazdoors can  do28.30 cu m( 1000 cu ft) per day. 

2. Refilling  shoveled  earth in foundations, plinth,etc., including   connection in 15 cm( 6 ”) layers – 3 Beldars, 2 Mazdoors and1/2 Bhishti  can do28.30 cu m( 1000 cu ft) per day. 

3. Disposal of  fat earth within a lead of 30m( 100) – 1 Mazdoor can do  cu m( 100 cu ft) per day.  Cement Concrete Work per2.83 cu m( 100 cu ft)  Laying cement concrete – 2 Beldars, 3 Mazdoors,3/4 Bhishti and1/4  Mason can do2.83 cu m( 100 cu ft) per day.  RCC Work  1. Laying  corroborated concrete – 3 Beldars, 3 Mazdoors,1.1/ 3 Bhishti and  Mason can do2.83 cu m( 100 cu ft) per day. 

2. Centering and shuttering for flat  shells – 4 Beldars and 4 Carpenters  II class) can do9.6 sq m( 96 sq ft) per day. 

3. underpinning work forR.C.C. – 1 Blacksmith or fitter and 1 Beldar can  bend and place in position 1 quintal( 2 cwt) of  sword per day. 

Stone Work per2.83 cu m( 100 cu ft)  Random  debris masonry with blue gravestone in foundations – 3 Masons, 3  Beldars, 2 Mazdoors and1/4 Bhishti can do2.83 cu m( 100 cu ft) per day.  Brickwork per2.83 cu m( 100 cu ft)  First class brickwork in 1 4 cement mortar in superstructure partition  walls, junctions of roof, alcazar walls and string course – 1 F.

Wood Work  1. For the frames of doors and windows – 2 Carpenters and 1 Beldar can  work0.18 cu m(6.40 cu ft) of wood  fellow to 4 door frames7.5 cm ×  10 cm of1.2 m ×2.1 m( 3 × 4 of 3 – 11 × 7) size per day. 

2. For panelled, glazed,etc., shutters – 15 Carpenters and 4 Beldars can  make and fix 4 shutters 40 mm thick of size2.00 in ×1.15 m( 12  1 thick  of size of 6 – 9 × 3 – 9) per day. volume of wood per shutter –0.075  cu m, i.e.,2.66 cuft.  Iron Work 

1. Fixing 40 mm × 3 mm × 38 cm( 1  2 1 ×1/8 × 15) flat iron holdfasts – 1  Blacksmith( II class),  Mason and 1 Beldar can fix 36 holdfasts per day. 

2. Fixing 16 mm dia(5/8 dia.)M.S. rods – 1 Blacksmith( II class), 2  Carpenters( II class) and 3 Beldars can fix16.5 m( 54 r ft) per day.  Flooring 4 cm 12  1) thick cement concrete flooring of 40 sq m( 400  sq- ft) bear – 5 Masons, 4 Beldars, 3 Mazdoors and 1 Bhishti per day  for mixing, laying and finishing.  Finishing 

1. Publishing with any mortar 12 mm(1/2) thick – 3 Masons, 3 Mazdoors  and 1 Bhishti can cataplasm 40 sq m( 400 sq ft) per day. 

2. White washing or colour washing( 3 fleeces) – 1 White washer and 1  Mazdoor can do 60 sq m( 600 sq ft) per day. 

3. Painting two fleeces  similar as chocolate; red,  slate,etc., on wood or  sword –  Painters and 2 Mazdoors can paint 10 sq m( 100 sq ft) per day.  

Que2.5. Calculate the rate of M15 grade concrete used in crossbeams of  a single fabled  structure.  

Answer  1. In the analysis of rates per cum, at first a volume of 10 cum( set volume)  has been considered to avoid one place of numeric. 

2. 1 cum of set volume of concrete corresponds to1.54 cum of dry volume  of concrete. 

3. thus for 10 cum of set volume = 15.4 cum of dry volume.  4. underpinning  sword for RCC for  shafts and crossbeams@ 1 of volume of  concrete and for columns@ 2 of volume of concrete.  1 cum  sword = 78.5 quintals.  To note , 10 contractor’s  If cement and  sword are supplied by thedepartment.profit shouldn’t be added on the cost of these accoutrements  but the cost of  transport from godown to worksite may be added. , hiring and running  If concrete mixer is employed for mixingconcrete.charges may be added@Rs. 100 per cum and labour may be reduced@  2 beldars per 10 cum. 

iii. Rate of bending, twiddling and binding with  sword cables may be taken as Rs. 150 per quintal. 

iv. Rate of centering and shuttering may be taken asRs. 200 per cum of  RCC work. 

v. For each  fresh storey the strength of mazdoors may be increased  6 nos per 10 cum.

 All India standard schedule of rates provides an  increase of rate by 1 per  bottom per cum for lifting the accoutrements  assuming  each  bottom to be an  normal of 3m.

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