Estimation and Preparation of BOQ

ESTIMATION & PREPARATION OF BILL OF QUANTITIES

Training Module on Estimation & Preparation of Bill of Quantities

A Guidelines for the preparation of BOQs and Estimates for Improvements & Maintenance of Rural Roads

A.1 Introduction Improvements to rural roads could be categorized into two:

1. Improvements to surface & drainage systems only 2. Improvements to geometry, widening, surfacing and drainage.

At this stage we have to presume, that our local bodies have their own priority lists indicating which roads to be surfaced and which are to be improved. For both cases you need a ground survey plan of the road with information such as existing edges, shoulder edges and drains delineated separately. Once you are equipped with this information it is recommended to follow the following steps for the category 1 improvement work.

1. Fix a horizontal alignment, almost following the existing Centre line 2. Mark the change at 20m interval 3. Get cross sections with sufficient widths to LHS and RHS 4. Plot the vertical alignment at 20m interval and smooth it out presuming a

desirable filling rather than appreciating cuts. 5. Once vertical alignment is done, then get the designed left/right edge readings. 6. Plot cross-sections at 20m intervals and indicate existing profile and designed

profile. 7. Once the above basic ground information is completed you are equipped to

prepare working drawings and you have a systematic methodology to evaluate the quantities.

We as road engineers and technical personals have to be very careful and methodical in administrating road construction works, as it has always been the case to exceed the quantities causing unrealistic cost over runs. We must minimized the variations and for this to be done methodologically we need the above sated ground information well before we prepare the BOQ & estimate.

Alternatively, it has been the conventional practice to have an visual inspection and then to prepare the BOQs. There is no doubt visual inspection is an very important aspect, we must carry out prior to the preparation a BOQ but estimation of quantities can only be carried out based on ground survey data stated above.

A.2 Important aspects we should looked into in a visual inspection

(a) Get an idea of the general cross section of the road (b) Assess to which degree the pavement is failed, failure type and how? (c) Whether the side drains are functioning, what has gone wrong with them? (d) Assess the structural soundness of the cross drainage structures? (e) Get an idea about the traffic volume and as well as the type of traffic? (f) Possible sections where mud slides, land slides and rock falls are possible? (g) Get an idea about the availability of good gravel and aggregate sources in

close vicinity to the road? A.3 General Notes Following general information and norms are very much useful to arrive at quantities, to

formulate specifications and to develop construction work programs. A.3.1 Concrete works

Cement : Road Authorities recommends Sansta, Ruhunu and Mitsui brands for structural concrete and masonry works.

2


For cement concrete pre-cast products: Road Authorities recommends SEC, SDCC and RCDC products.

For all RCC or grade concrete use concrete mixer, if the volume involved is > 3m3 .

Use weight batch mixes for all concrete above grade 25. Batching of materials in the field under average conditions will be in the

proportions 1:21/2:4 by volume to obtain the nominal mix of cement concrete 1:2:4 19mm)

For 1:3:6 (37.5mm) and 1:4:8 (50mm) mixes you may continue to be batched by volume in the specified nominal proportions.

A.3.2 Earthworks and Compaction

Compacted and loose volume ratios for 95% and 100% densities are 1:35 and 1:42 respectively.

The normal output of earth compaction using 8-10 Ton roller is approximately 66m3 per day.

When the compaction width is less than 1.5m, the output reduces to 50m3 per day.

A.3.3 Aggregates and Compaction

The rate for aggregate compaction should normally include the cost for watering too.

The average rate of traveling of a oil/diesel roller is 20km per day. A.3.4 Asphalt Concrete (Hot mix / Cold mix)

For estimation purposes it is recommended to adopt a compacted density equal to 1.25MT/m3. But for actual payments design densities should be used.

Average density of asphalt premix in loose state can be assumed as 1.48 MT/m3.

Quantity of aggregate required for m3 of asphalt premix is 0.6270m3. Quantity of CSS-1 (Emulsion) required for 1MT of cold mix is 59.17 litter.

A.3.5 Quantities of Components for Cement Concrete and Cement Mortars used for

Road Works. Description Grade Yield Unit Cement in

50 bags Sand m3 Aggregate /

Rubble m3 Cement concrete

G40 (19mm) M3 9.87 0.60 0.91

Ditto G30 (19mm) M3 8.12 0.60 0.91 Ditto G25(19mm) M3 6.35 0.60 0.90

Ditto G25 (37.5mm

7% + 19mm 30% M3 5.86 0.57 37.5=0.54

19=0.24 Ditto G20 19mm) M3 5.65 0.60 0.90 Ditto 1:1:5:3(19mm) M3 8.12 0.60 0.91 Ditto 1:2:4(19mm) M3 5.65 0.60 0.90 Ditto 1:2:4 (37.5 mm) M3 4.38 0.60 1.00 Ditto 1:3:6(19mm) M3 4.38 0.60 0.91 Ditto 1:4:4(50mm) M3 3.18 0.60 1.00

12.5mm Ct. render

1:2 mix Sq.m 0.1 0.013 1.00

19mm Ct. render

1:2 mix Sq.m 0.23 0.020 -

3


12.5mm Ct. render

1:3 mix Sq.m 0.12 0.016 -

19mm Ct. render

1:3 mix Sq.m 0.19 0.024 -

RRM in Ct. mortar

1:6 mix M3 1.77 0.40 1.10

A.4 Examples A standard Bill of Quantities (BOQQ) for a rehabilitation road will normally have work

items under following phases. (a) Preliminary (b) Site Clearing (c) Earthworks (d) Construction of Sub-base, Bases and Shoulders (e) Surface Applications & Surfacing (f) Drainage Construction (g) Incidental Construction (h) Structures - Slab Culverts - Box Culverts - Pipe Culverts - Bridges - Retaining Walls/ Toe Walls - Gabion Walls (i) Day works A.4.1 Standard Bill of Quantities for a Rural Road A.5 Preparation of a BOQ for sand sealing treatment

4


ANNEX - 1

5


BILL OF QUANTITIES

WIDENING & IMPROVEMENTS TO ………….ROAD/IMPROVEMENTS TO INTERSECTIN OF

BILL NO. 01 – PREMILINARIES

Item No. Pay Item Description Qty Unit Rate Amount

Rs. Cts. Rs. Cts. 1.1 -- Allow for mobilization Item Lump Sum

1.1.2 Allow for demobilisation Item Lump Sum

1.3 305(A) Existing utilities and utility diversions Item Prov. Sum

1.4 Provide Office for the Engineer Month

1.4.1 Maintain Office for the Engineer Month

1.5 Provide House for the Engineer

1.5.1 Maintain House for the Engineer

1.6 Provide Furniture for the Engineer's House and Office

Item Prov. Sum

1.5.1 Office consumables for the Engineer Month

1.7 Stationery and other services including water,

electricity and telephone for the Engineer. Item Prov. Sum

1.8 Engineer's technical and clarical staff

1. Clerk/Typist Month

2. Computer Operator Month

3. Licensed Surveyor/Engineer (Intermittent) Month

4. Office Aide Month

5. House Servent / Watcher Month

6. Chainmen Day

1.9 Provide and maintain vehicle for the Engineer Veh. Week

1.10 Allow for maintenance of the road surface

during the construction period as directed. Week

1.11 Allow for water sprinkling Week

1.12 Allow for safety of road users including

watching, lighting and barricading. Month

1.13 Provision of project name boards as directed by

the Engineer. 02 Nos.

1.14 Survey equipment for the Engineer Item Lump Sum

6


1.15 Survey cross sections, preparation of drawings and setting out & levelling.

Item Lump Sum

1.16 Provide monthly Progress Report & Final

Report and as built drawings, to Engineer. Item Prov. Sum

Bill No. 01 Carried to Summary:

BILL NO. 02 – SITE CLEARING


Rs. Cts. Rs. Cts.

2.1

202(1)

Allow for demolishing existing buildings, parapet walls, fences etc., and removal of obstructions and objectionable materials in preparing right of way.

Item Prov.Sum 2.2 201(2) Allow for clearing the right of way including removal

and disposal of all trees, stumps, roots, vegetation and other obstructions as directed.

Item Prov.Sum Bill No. 02 Carried to Summary:

BILL NO. 03 - EARTH WORKS


Rs. Cts. Rs. Cts.

3.1 -- Supplying and laying approved quality geotextile fabric on prepared surface of marshy ground as directed.

Sq.m. 3.2 -- Supplying and spreading sand, forming a sand

blanket on the geotextile fabric as directed.

Cu.m. 3.3 304(2) Supplying, spreading and compacting

approved soil on the sand blanket for forming lower embankment as per specification.

Cu.m. 3.4 304(2) Supplying, spreading and compacting

approved soil on lower embankment forming upper embankment as per specification.

Cu.m. 3.5 -- Supplying and spreading of pervious material

of specified gradation to from a continuous drainage layer of …..mm thick as directed.

Cu.m. 3.6 301(1) Roadway excavation in loose /ordinary /

medium / hard unclssified soil including removal of unclassified material from the site.

Cu.m.

7


3.7 301(3) Roadway excavation in soft rock. Cu.m.

3.8 301(3) Roadway excavation in rock requiring blasting. Cu.m.

3.9 304(3) Trimming, levelling and compaction of original ground to 100% standard density.

Sq.m.

3.10 408(3) Scarifying existing road surface to 50mm depth by roller.

Sq.m.

3.11 304(2) Soil sub grade material spread & compacted in position Type II embankment material as per specification.

Cu.m

3.12 601(1) Soil sub grade material spread & compacted in position Type II embankment material as per specification (material available at site) )

Cu.m


BILL NO. 04 - CONSTRUCTION OF SUB BASES, BASES & SHOULDERS


Rs. Cts. Rs. Cts.

4.1

401(1) Approved soil sub base Type I material spread & compacted in position as per specification.

Cu.m.

4.2

401(1) Approved soil sub base Type II material spread & compacted in position, as per specification.

Cu.m.

4.3

405(1) Supplying, spreading and compacting graded aggregate (37.5mm) to form a dense graded aggregate base as per specification.

Cu.m.

Bill No. 04 Carried to Summary :

8


BILL NO. 05 - SURFACE APPLICATIONS AND SURFACINGS


Rs. Cts. Rs. Cts. 5.1

501(2)

Application of prime coat using bitumen emulsion CSS-1 at the rate of 1.0Ltr/Sq.m, as per specification.

Sq.m. 5.2 504(1) Sand sealing using emulsion CRS-1 orCRS-2

at the rate of 0.8 Ltr/Sq.m as per specification.

Sq.m.

5.3 502(2) Application of tack coat using bitumen

emulsion CSS-1 or CSS-2 at the rate of 0.4Ltr/Sq.m as per specification.

Sq.m.

5.4 407 (1) Supply and laying of bitumen bound base

(37.5mm), as per specification. M.T

5.5

506(1)

Asphalt concrete binder course, as per specification.

M.T 5.6

506(1)

Asphalt concrete wearing course, as per specification.

M.T


BILL NO. 06 - DRAINAGE CONSTRUCTION

Item No. Pay Item Description Qty Unit

Rate

Amount

Rs. Cts. Rs. Cts.

6.1 701(1)

Excavation for built up drains in unclassified soil & backfilling.

Cu.m. 6.2 701(1) Excavation for earth drains in unclassified soil

(cutting measurement). Cu.m.

6.3 1008(2) Supplying and fixing 25mm thick planks and struts of Class II timber as formwork rough finish, in foundation of built up drains including removing.

Sq.m. 6.4 1008(1) Supplying and fixing smooth shuttering of

Class II timber as formwork complete with props etc. for concreting walls of built up drains including removing.

Sq.m. 6.5 1001(3) Class C concrete nominal mix 1:3:6

(37.5mm) as screed to the foundation.

Cu.m. 6.6 1001(2) Class B concrete grade 25 (19mm) in

foundation slabs & walls of built up drains.

Cu.m.

9


6.7 1002(1) Fabricate and lay tor steel bars as reinforcement in built up drains.

M.T 6.8 1002(1) Fabricate and lay mild steel bars as

reinforcement in built up drains.

M.T. 6.9 701(3) Random Rubble masonry using 150-225mm

rubble in cement sand mortar 1:5 mix for R R masonry drains.

Cu.m. 6.10 1006(3) Plastering 19mm thick in cement sand mortar

1:3 mix (smooth finish) in exposed surfaces of R R masonry walls.

Cu.m. 6.11 704(1) Laying & joining 300/450/600mm dia.

concrete pipes for under ground drainage, as per specification.

L.m 6.12 1012(6) Supplying and laying reinforced concrete

cover slabs class B concrete grade 25 (19mm) for built up drains , including loading and unloading (size of the slab. ………………..m.)

Nos. 6.13 703(4) Construction of kerb inlets, Type KI/P/T1,

KI/P/T2 , KI/P/T3 as per drawing No. SD 2/1, SD 2/2, SD 2/3.

Nos. 6.14 703(4) Construction of kerb inlet, type KI/T1 as per

drawing No. SD 2/4. Nos.

6.15 703(4) Construction of kerb inlets, Type KI/M/T1, KI/M/T2 as per drawing No. SD 3/1, SD 3/2.

Nos.

6.16 703(4)

Construction of kerb inlet, Type CM/T1 as per drawing No. SD 3/3.

Nos.

6.17 704(1)

Laying & joining 225mm dia concrete pipes from kerb inlet to flumes as out lets, as per specification.

L.m.

6.18 --

Construction of standard paved flumes at outlet of kerb inlets, as per drawing.

Nos.

6.19 703(3) Construction of catchpit (size … .m)

Nos.

6.20 703(1) Construction of manhole (size ……m)

Nos.


10


BILL NO. 07 - INCIDENTAL CONSTRUTION


Rs. Cts. Rs. Cts.

7.1 810(1)

Application of road markings, as per specification.

Item Prov.Sum

7.2 811(1)

Providing & erecting road signs, as per specification.

Item Prov.Sum

7.3 --

Providing & erecting kilometer posts, as per Drawing No.

Item Prov.Sum

7.4 --

Providing & erecting RDA boundary markers, as directed and as per Drawing No.

Item Prov.Sum

7.5 --

Providing & erecting standard type guard stones, as per Drawing No.

Item Prov.Sum

7.6 -- Construction of access roads as directed.

Item Prov.Sum

7.7 808(1)

Providing & erecting standard type guard rails, as per specification.

L.m.

7.8 801(2)

Top soiling of embankment slopes where turfing necessary.

Cu.m.

7.9 802(1) Turfing by sprigging.

Sq.m.

7.10 802(2) Turfing by seeding.

Sq.m.

7.11 802(3) Turfing by sodding (solid/strip/spot)

Sq.m.

7.12 1013(1)

Provision of street lighting system ( single sided/ opposite sided / staggered /centre median arrangement) with high pressure sodium vapour lamps with lumen output of ……….. lumens at ………….W including necessary fittings as per drawings & specifications.

Nos.

7.13 807(1)

Supply and laying double arm / single arm standard type road kerbs in raised footwalks/ centre median/center island/splitter islands/traffic islands and bus bays (125mm wide and 900mm long) set on 19mm thick 1:3 cement sand mortar layer on 150mm x 275mm wide nominal mix 1:2:4 (19mm) concrete foundation with average 157mm x 150mm wide backing with same concrete including excavation and shuttering, as per specification.

L.m

7.14 806(2)

Supplying, spreading and compacting approved soil on raised footwalks/center median/traffic islands, as directed.

Cu.m

7.15

806(1) Supplying & laying of 450 x 450 x 50mm precast concrete slabs on raised footwalks centre median/traffic islands including average 40mm thick sand/cement mortar bedding, as per specification.

Sq.m.

11


7.16

806(1) Paving of raised footwalks/ side walks/ shoulders with bituminous surfacings (SBST, DBST, Asphalt concrete cold mix, asphalt concrete hot mix), as per specification.

Sq.m.

7.17 808(1) Supplying and fixing pedestrian guard rails.

L.m.


BILL NO. 08 - STRUCTURES


Rs. Cts. Rs. Cts.

Slab Culverts

8.1 202(1)

Demolition & removal of existing culvert foundations in the areas where new foundations to be constructed and clearing.

Item Prov.Sum

8.2 302(1)

Excavation for foundations in unclassified soil & backfilling of structures, as per specification.

Cu.m.

8.3 302(5)

Preparation of base of foundation

Item Prov.Sum

8.4 302(7)

Dewatering

Item Prov.Sum

8.5 1005(7)

Supplying hot rolled mild steel dowels, 1m long spliced & dove tailed at one end and fixing in 16/29/25mm dia, bore holes to 0.3m depth.

No.

8.6 1008(2)

Supplying and fixing 25mm thick planks & struts of Class II timber as formwork rough finish, in foundations of abutments and wing walls including removing.

Sq.m.

8.7 1008(1)

Supplying and fixing smooth shuttering of Class II timber as formwork complete with props etc. for abutments, wingwalls, capping beams & slabs including removing.

Sq.m.

8.8 1001(3)

Class C cement concrete nominal mix 1:3:6 (37.5mm) as screed to the foundation slabs of abutments and wing walls.

Cu.m.

8.9 1001(3)

Class C cement concrete nominal mix 1:3:6(37.5mm) in foundation slabs.

Cu.m.

12


8.10 1001(2)

Class B cement concrete grade 25 (19mm) in foundation slabs.

Cu.m.

8.11 1001(3)

Class C cement concrete nominal mix 1:3:6 (37.5mm) in abutments / wing walls.

Cu.m.

8.12 1001(2)

Class B cement concrete grade 25, (19mm) in abutments and wing walls.

Cu.m.

8.13 1006(1)

Random Rubble masonry using 150-225mm rubble in cement sand mortar 1:3 mix for abutments, wing walls and parapet walls.

Cu.m.

8.14 1006(3)

Plastering 19mm thick in cement sand mortar 1:3 mix (smooth finish) in exposed surfaces of walls.

Cu.m.

8.15 1001(1)

Class A cement concrete grade 25 (19mm) for capping beams & slabs.

Cu.m.

8.16 1002(1)

Tor steel as reinforcement for foundation slabs / abutments / wing walls / capping beams & slabs.

M.T.

8.17 1002(1)

Mild steel as reinforcement for foundation slabs / abutments / wing walls/ capping beams & slabs.

M.T.

8.18 706(1)

Forming weep holes in abutments and wing walls using P.V.C. pipes of int. dia. not less than 75mm complete with dripledge and surround finished smooth.

L.m.

8.19 705(3)

Clay puddled and laid behind abutments and wing walls.

Sq.m.

8.20 705(1)

50-200mm aggregate backfilling behind abutments and wing walls.

Cu.m.

8.21 705(2)

Supplying and packing 75mm thick 40mm stone filter layer behind dry stone lining.

Cu.m.

8.22 808(2)

Providing & erecting standard type guard stones as directed.

No.

8.23 --

Widening of existing slab culvert at Chainage ……...

Prov.Sum


Rs. Cts. Rs. Cts.

13


Box Culverts

8.24 202(1)

Demolition & removal of existing culvert foundations in the areas where new foundations to be constructed and clearing.

Item Prov.Sum

8.25 302(1)

Excavation for foundations in unclassified & backfilling of structures as per specification.

Cu.m.

8.26 302(5)


Item Prov.Sum

8.27 302(7)

Dewatering

Item Prov.Sum

8.28 1008(1)

Supplying and fixing smooth shuttering of Class II timber as formwork complete with props etc. for box culvert including removing.

Sq.m.

8.29 1001(3)

Class C cement concrete nominal mix, 1:3:6(37.5mm) as screed to the base slab of box culvert.

Cu.m.

8.30 1001(1)

Class A cement concrete grade 25 (19mm) in walls of box culvert.

Cu.m.

8.31 1001(3)

Class C cement concrete nominal mix, 1:3:6 (37.5mm) in wing walls / Concrete parapet walls.

Cu.m.

8.32 1006(1)

Random Rubble masonry using 150-225mm rubble in cement sand mortar 1:3 mix for wing walls.

Cu.m.

8.33 1006(3)


Cu.m.

8.34 1002(1)

Tor steel as reinforcement.

M.T.

8.35 1002(1)

Mild steel as reinforcement.

M.T.

8.36 706 (1)

Forming weep holes in box culvert walls and wing walls using P.V.C. pipes of int. dia. not less than 75mm complete with dripledge and surround finished smooth.

L.m.

8.37 705(3)

Clay puddled and laid behind box culvert walls (as directed).

Cu.m.

8.38 705(1)

50-200mm aggregate backfilling behind box culvert walls.

Cu.m.

14


8.39 705(2)


Cu.m.

8.40 808(2)

Providing & erecting guard stones as directed.

Nos.

8.41 --

Widening of existing box culvert at Chainage ……..

Item Prov.Sum


Rs. Cts. Rs. Cts.

Pipe Culverts

8.42 202(1)

Demolition & removal of existing culverts in the areas where new culverts to be constructed and clearing.

Item Prov.Sum

8.43 302(1)

Excavation of trench for laying of pipes in unclassified soil and backfilling as per specification.

Cu.m.

8.44 302(5)

Preparation of base.

Item Prov.Sum

8.45 302(7)

Dewatering

Item Prov.Sum

8.46 707(3)

Supplying, Laying & joining 600/900/1200mm dia. concrete pipes.

L.m.

8.47 1008(2)

Supplying and fixing 25mm thick planks & struts of Class II timber as formwork rough finish, in foundations of head walls &end walls including removing.

Sq.m.

8.48 1008(1)

Supplying and fixing smooth shuttering of Class II timber as formwork complete with props etc. for end walls & head walls including removing.

Sq.m.

8.49 1001(3)

Class C cement concrete nominal mix 1:3:6(37.5mm) as screed to the foundation slabs.

Cu.m.

15


8.50 1001(3)

Class C cement concrete nominal mix 1:3:6 (37.5mm) in foundation slabs.

Cu.m.

8.51 1001(3)

Class C cement concrete nominal mix 1:3:6 (37.5mm) in head walls & end walls.

Cu.m.

8.52 1006(1)

Random Rubble masonry using 150-225mm rubble in cement sand mortar 1:3 mix for head walls & end walls.

Cu.m.

8.53 1006(3)


Cu.m.

8.54 706(1)

Forming weep holes in head walls & end walls using P.V.C. pipes of int. dia. not less than 75mm complete with dripledge and surround finished smooth.

Cu.m.

8.55 705(3)

Clay puddled and laid behind end walls & head walls.

Cu.m.

8.56 705(1)

50-200mm aggregate backfilling behind end walls & head walls.

Cu.m.

8.57 705(2)


Cu.m.

8.58 808(2)

Providing & erecting standard type guard stones as directed.

Nos.

8.59 --

Widening of existing pipe culvert at Chainage ……….

Prov.Sum

--

Bridges

8.60 --

Widening of existing bridge at Chainage ……….

Item Prov.Sum

8.61 --

Construction of new bridge at Chainage …...

Item Prov.Sum


Rs. Cts. Rs. Cts.

Retaining Walls/ Toe Walls

8.62 302(1)

Excavation in unclassified soil for foundation and backfilling as per specification.

Cu.m.

16


8.63 302(5) Preparation of base of foundation

Item Prov.Sum

8.64 302(7) Dewatering.

Item Prov.Sum

8.65 1005(7)

Supplying hot rolled mild steel dowels, 1m long spliced & dove tailed at one end and fixing in 16/20/25mm dia. bore holes to 0.3m depth.

No.

8.66 1008(2)

Supplying & fixing 25mm thick planks and struts of Class II timber as formwork rough finish, in foundation including removing.

Sq.m.

8.67 1008(1)

Supplying and fixing smooth shuttering of Class II timber as formwork complete with props etc. for concrete retaining walls/toe walls including removing.

Sq.m.

8.68 1001(3)

Class C cement concrete nominal mix 1:3:6(37.5mm) as screed to the foundation slabs of retaining walls.

Cu.m.

8.69 1001(3)

Class C cement concrete nominal mix 1:3:6 (37.5mm). in retaining walls/toe walls.

Cu.m.

8.70 1001(2)

Class B cement concrete grade 25 (19mm) in retaining walls/toe walls.

Cu.m.

8.71 1006(1)

Random Rubble masonry, 150-225mm rubble in cement sand mortar 1:5 in retaining walls/toe walls.

Cu.m.

8.72 1006(3)

Plastering 19mm thick with cement sand motar 1:3 mix (smooth finish) in exposed surfaces of retaining walls/toe walls.

Sq.m.

8.73 1002(1) Tor steel as reinforcement.

M.T.

8.74 1002(1) Mild steel as reinforcement.

M.T.

8.75 706(1)

Forming weep holes in retaining walls using P.V.C. pipes of int. dia. not less than 75mm complete with dripledge and surround finished smooth.

L.m.

8.76 705(3)

Clay puddled and laid behind retaining walls/toe walls.

Cu.m.

8.77 705(1)

50-200mm aggregate backfilling behind retaining walls/toe walls.

Cu.m.

8.78 705(2)

Supplying & packing '75mm thick 40mm stone filter layer behind dry stone lining.

Cu.m.

8.79 808(2)


Nos.


Rs. Cts. Rs. Cts.

17


Gabion Walls

8.80 302(1)

Excavation in unclassified soil for foundation & backfilling as per specification.

Cu.m

8.81 302(5)


Item Prov. Sum

8.82 302(7)

Dewatering

Item Prov. Sum

8.83 1008(2)

Supplying & fixing 25mm thick planks and struts of Class II timber as formwork rough finish, in foundation including removing.

Sq.m.

8.84 1001(3)

Class C cement concrete nominal mix 1:3:6(37.5mm) as screed to the foundation slabs of gabion walls.

Cu.m

8.85 1001(3)

Class C cement concrete nominal mix 1:3:6 (37.5mm) in foundation slabs.

Cu.m

8.86 1001(2)

Class B cement concrete nominal mix 1:2:4 (19mm) in foundation slabs.

Cu.m

8.87 805(1)

Construction of gabion wall using 4x1x1m / 4 x1x 0.5m mesh on prepared ground / on foundation slab.

Cu.m

8.88 808(2)


Nos.


BILL NO - 09 – DAYWORKS


Rs. Cts. Rs. Cts.

ALL QUANTITIES ARE PROVISIONAL

9.1 Labour (Sri Lankan Nationals)

9.1.1 Foreman

Day

9.1.2 Site Surveyor

Day

9.1.3 Skilled Equipment Operator

Day

9.1.4 Semi Skilled Equipment Operator Day

9.1.5 Driver (Heavy Duty Vehicle)

Day

9.1.6 Driver (Light Duty Vehicle)

Day

9.1.7 Mechanic Day

9.1.8 Skilled workman

Day

18


9.1.9 Semi Skilled workman Day

9.1.10 Labourer Day

Labour Sub Total (Carried Forward)

Note:

Rates shall apply to Sri Lankan Nationals Tenderers intending to utilise Foreign National Labour shall submit a schedule of rates for such categories of labour that may be employed.

9.2 Equipment

Capacities detailed for items refer to fly

wheel power ratings, carrying capacities of

trucks, Manufacturer's ratings or maximum recommended loads etc.

9.2.1 Motor Grader from 50 to 100 HP

Hour

9.2.2 Wheeled Excavator Over 50 HP(Back hoe)

Hour

9.2.3 Highway Tipper Lorries up to 5 tons

km

9.2.4 Highway Tipper Lorries From 5 to 10 tons

km

9.2.5 Porker Vibrator

Hour

9.2.6 Plate Vibrator

Hour

9.2.7 Vibrating Rammer(60kg)

Hour

9.2.8 Vibrating Roller(1/2-1 ton)

Hour

9.2.9 Vibrating Roller(smooth 10 tons)

Hour

9.2.10 Pneumatic Tired Roller up to 8 tons

Hour

9.2.11 Pneumatic Tired Roller 8-12 tons

Hour

9.2.12 Pneumatic Tired Roller- over 12 tons

Hour

9.2.13 Smooth Road Roller(8-10tons)

Hour

9.2.14 Water Bowser(4000litres)

km

9.2.15 Baby Dumper

Hour

9.2.16 Wheel loader ( 2.70 to 3.1 Cu.m)

Hour

9.2.17 Asphalt Paver (Crawler)

Hour

9.2.18 Bitumen Distributor(4000 liters)

Hour

9.2.19 Bitumen Sprayer Hour

9.2.20 Sand/Chip Spreader(Propelled 4000 liters)

Hour

9.2.21 Sand/Chip Spreader- towed Hour

9.2.22 Asphalt/Concrete Mixer (4000 Liters)

Hour

9.2.23 Concrete Mixer with weight batcher 114/10

Hour

9.2.24 Water Pump 100mm

Hour

9.2.25 Water Pump 50mm

Hour

9.2.26 Tractor and Trailer

Hour

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9.2.27 Welding Plant with Generator set

Hour

9.3 Material (Base Cost)

9.3.1 Prime Coat Cut back MC 30

Litre

9.3.2 Tack Coat Cut Back RC

Litre

9.3.3 Bitumen 80/100 PEN Litre

9.3.4 Cationic Bitumen Emulsion CRS II

Litre

9.3.5

Asphalt concrete surfacing material binder 6% mix-dense (19mm)

M.Ton

9.3.6

Asphalt concrete bound base material binder 3.53% mix-dense (37.5mm)

M.Ton

9.3.7 Diesel

Litre

9.3.8

Crushed Aggregates for PC and Asphalt Concrete

Cu.m

9.3.9

Natural washed fine aggregate for PC and Asphalt Concrete

Cu.m

9.3.10 Portland Cement

Bag(50kg)

9.3.11 Reinforcing Mild Steel Grade 250

M.Ton

9.3.12 Reinforcing High Yield Grade 460/425

M.Ton

9.3.13 Dense graded aggregate for road base.

Cu.m

9.3.14

Timber Class II of Sri Lankan Timber Corporation or equivalent

Cu.m

Percentage on Materials to cover overheads , profits and all other costs applicable to Materials in Bill Items in 9.3


20


21

A.6 Preparation of a BOQ for Sand sealing Treatment (a) How do we carry out a sand sealing treatment? Because it is a surface treatment, it won’t correct any surface irregularities, as such prior to carry out a sand sealing treatment it is required to correct the pavement for proper center and also to regulate drainage. Example 1: Observe the Fig. 01 and recommend, the course of steps to be taken prior to commence a sand sealing treatment.

Fig: 01: The typical situation of a metal and tared road-C class

Observations Obviously the road pavement has structurally failed probably due to excessive axle loads. As such prior to carry out a sand sealing treatment, the pavement has to be rectified. Once it is rectified you still need to attend following tasks prior to carry out the sand sealing treatment.

Ensure a pavement cross should not be less than 4.0% Ensure a shoulder cross fall should not be less than < 5% Cleaning of all chocked culverts & deepening of existing side drains.

Hence a BOQ for sand sealing of this particular road section should include the above major improvement tasks as well. The trainer is expected to explain in detail means of estimating quantities for above tasks we identified prior to carryout the sand sealing task. The Annex 2 provides a typical list of activities involved in a sand sealing treatment.


ANNEX - 2

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A.6.1 A typical BOQ for sand sealing will comprised with the following work items.

Item No.

Description Unit Rate Quantity Amount

1 Cleaning desilting existing drain and lead up drains to proper shape & gradient and transport of excavated materials from road side up to 100m.

Lm

2 Cleaning choked culverts (with head room >1m) if the culvert head room is <1m work shall be carried out on day works basis.

3 Cutting scupper drains on any soil other than rock to an average width of 0.75m with proper gradient and an average depth of 100mm.

Lm

4 Correction of corrugations, depressions and cambering road surfaces using asphalt concrete compacted by vibrating roller including internal transport.

M.ton

5 Sand sealing with emulsion CRS-2 at the rate of 0.8/sqm using plant, & blinding with sand at the rate of 125 Sqm per Cum including internal transport.

Sqm

A typical BOQ for Rural Road District : Gampaha Region : Negombo Electorate : Ja-Ela Estimate : Metal & faring Narangoda Road

Work description Quantities Item Price Amount Total This estimate includes all expenditure in respect of materials labour & equipment Prepared by: Checked by:

Item Nos. (1) to (9) Contingency Engineer Provincial Council Negombo

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The estimate The BOQ Item No.

Description of work Unit Quantity Price Total

01 Supplying & filling of 4” aggregate including transport

M3

02 Supplying & filling of 1 ½” aggregate including transport

M3

03 Supplying & filling of ¾” aggregate including transport

M3

04 Spreading of 4” aggregate & compaction

M3

05 Spreading of 1 ½” and ¾” aggregate & compaction

M3

06 Application of a first coat at the rate of 3l/m2 and blinding with sand

M2

07 Application of the 2nd coat at the rate of 1.252/m2 and blinding with sand.

M2

08 Allow for transport of bitumen

Barrels

09 Allow for transport of road roller

Days

Date post:	12-Mar-2015
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Estimation and Preparation of BOQ

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