8/10/2019 Widening of Cuts

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33.08 Widening of cuts (extraover Items 33.01,33.02 and 33.04):(a) In hard material . . . . . . . . . . . . . cubic metre (m3)(b) In boulder materialClass A or Class . . . . . . . . . . . . . . . . cubic metre (m3)(c) In all other materials . . . . . . . . . cubic metre (m3)

!he unit o" measurement shall be the cubic metre o"material excavated durin# the $idenin# o" cuts $here the%are more than 2.& m dee', measured verticall% "rom the to'o" the cut to the shoulder brea'oint and $here the sideslo'e is $idened b% 4 m or less.

easurement o" the material shall be in the ori#inal 'ositionin the cut, and the *uantit% shall be com'uted b% the methodo" avera#e end areas "rom levelled cross+sections atintervals not exceedin# 20 m measured alon# the centre lineo" the road be"ore and a"ter removal o" the material.!he tendered rates "or $idenin# the cuts shall be 'aid extraover the rates tendered "or Items 33.01, 33.02 and 33.04and shall include "ull com'ensation "or the additional costsinvolved (over and above those "or excavatin# ne$ cuttin#s)"or excavatin# material b% $idenin# the cuts $here the%exceed 2.& m in de'th and are $idened b% less than 4 m.

!he *uestions that arise:

hat i" the de'th is 2.& a"ter $idenin#, but less than 2.& be"ore $idenin#-

rom a 'ractical 'oint o" vie$, the Contractor has costs "rom the 'osition "rom $here he starts excavatin#. I"

the natural side slo'e is ver% stee', he $ill have to start "rom hi#h u', $hereas the de'th o" the cut ma% be lessthan 2.& $hen he starts. It loos as i" the measurement should be taen "rom the to' o" the $idened cut, to theshoulder brea'oint.

hat area is measured- I" the cut at the bottom is narro$er than 4m, and at the to' $ider than 4m, is the entire areameasured, or onl% the 'ortion $here the hori/ontal $idth is less than 4m-

ne ar#ument is as "ollo$s:

xcavation at the to' is $ider than 4m, and the contractor $ill there"ore not have the additional cost o" narro$

excavation. e can use a ri# on tracs, instead o" handheld drills. !he is there"ore onl% 'a%able underneaththe hori/ontal 'lane $here the $idth o" $idenin# is less than 4m.

!he counter ar#ument is that that is not $hat the s'eci"ication sa%s. !he s'ec does not tal o" dividin# the cut intohori/ontal slices.

I acce't the "irst ar#ument. It does not clash $ith the s'eci"ication, it measures $here the side slo'e is $idened b% 4m orless. I" the 'ortion at the to' is measured, on that s'eci"ic 'lane the side slo'e $ill not be $idened b% 4m or less .

I" the side slo'e o" the ne$ cut is stee'er than the side slo'e o" the existin# cut, the cut ma% be less than 4m at the to',and more than 4 m at the bottom.

!he ar#ument can then be that the Contractor should be 'aid "or the 'ortion at the to', because he has the

inconvenience o" narro$ $orin# areas. e has to mae use o" hand+held drills. As soon as the $idthincreases to more than 4m, the Contractor can brin# in a ri#, and have lo$er excavation cost. 'a%mentshould sto' at the level $here the $idth becomes more than 4m. !he is there"ore onl% 'a%able above thehori/ontal 'lane $here the $idth is 4 m or less.

A#ain, the counter ar#ument is that the s'eci"ication does not tal about dividin# the cut in hori/ontal slices.

I acce't the "irst ar#ument. It does not clash $ith the s'eci"ication, it measures $here the side slo'e is $idened b% 4m orless. I" the 'ortion at the to' is measured, on that s'eci"ic 'lane the side slo'e $ill not be $idened b% 4m or less .