The t o t a l mass of a l l round and square s t e e l bars w i l l be scheduled as bars of nominal s i z e 1 5 mm
(diameter or s i d e , as relevant) for the purpose of obtaining a b a s i c c o n t r a c t p r i c e , and the bars of a l l
s i z e s actually used w i l l be subject to the terms of the conditions of c o n t r a c t covering valuation of
v a r i a t i o n s .
The q u a n t i t i e s (or percentayes) of a l l other s i z e s of s t e e l bars t h a t may be required w i l l be scheduled
as provisional q u a n t i t i e s , the contract p r i c e s for which w i l l be fixed regardless of t h e magnitude of
variations ( i f any) of q u a n t i t i e s .
Welded mesh w i l l be scheduled separately for each type and mass per square metre of mesh.
a) The u n i t r a t e s f o r s t e e l bars of nominal s i z e 25 mm s h a l l cover the cost of the supply, c u t t i n g ,
bending, placing i n position, and fixiny of the reinforcing and supporting s t e e l scheduled, and the
provision of a l l spacer devices and bindiny wire, as well as t h e c o s t of t e s t s i n terms of SABS 920.
b) The extra-over r a t e s f o r b a r s of a l l nominal s i z e s other than 25 mm s h a l l cover any d i f f e r e n c e s in
cost a r i s i n g from any or a l l of t h e o p e r a t i o n s s e t out i n (a) above i n respect of bars of such other
sizes.
c) The u n i t r a t e for welded mesh s h a l l cover the supply, c u t t i n g , and placing of mesh, and the cost of
a l l waste due to laps.
Concrete
a ) Concrete will be measured net to the dimensions shown on the drawings or t o the dimensions c a s t ,
whichever a r e t h e smaller. S t r u c t u r a l elements t h a t are undersized w i l l be measured for payment only i f
they are accepted by the Engineer.
b) No allowance w i l l be made for concrete required to make up overbreak i n s o f t excavation, b u t payment
w i l l be made for addit.iona1 concrete or formwork, or both, ordered i n writing by the Engineer to replace
unsuitable material or overbreak i n hard rock or i n intermediate excavation ( s e e ( d ) below).
c) Subfoundation carpets and blinding l a y e r s w i l l be measured t o the plan s i z e of t h e coiicrete s t r u c t u r e
resting on the carpet.
thickness as c a s t provided t h a t the Enyineer is s a t i s f i e d t h a t ':he excavation has not a t any point been
taken deeper or wider than necessary (see (b) above).
d) Where, in terms of (b) above, concrete is ordered to be placed d i r e c t l y against t h e sides or bottoms
of excavations i n hard rock or i n intermediate excavation, an i.tem may be included i n the schedule of
q u a n t i t i e s for any a d d i t i o n a l concrete placed i n overbreak. Such a d d i t i o n a l concrete w i l l be measured on
the basis of the s u p e r f i c i a l area of t h e s i d e s or bottom, or both, as applicable, of the t h e o r e t i c a l net
excavation i n rock t h a t is overbroken and i n contact with the concrete.
Separate items w i l l be scheduled, as applicable, f o r each grade of concrete, and for each unit of the
Works or each element of t h e s t r u c t u r e , and for each type of cement. Except as provided for i n 8.1.4,
separate items w i l l a l s o be scheduled f o r d i f f e r e n t conditions (of placing c o n c r e t e , for small q u a n t i t i e s
(each l e s s than 0,5 m3 of formed c o n c r e t e ) , and f o r d i f f e r e n t surface f i n i s h e s (other than s t r i k i n g - o f f
and levelling) such as wood-floated or s t e e l - f l o a t e d f i n i s h e s , .and g r a n o l i t h i c or mortar screeds.
a) The u u i t r a t e s s h a l l cover the cost of the design of the mix i n the case of s t r e n g t h concrete, the
provision of concrete (made with ordinary portland kement unless otherwise scheduled), mixing, t e s t i n g ,
placing, compacting, the forming of stop-ends and unforeseen construction j o i n t s , s t r i k i n g - o f f or
levelling as applicable, and curing and repairing where necessary.
b ) Floor slabs, whether placed on subfoundation c a r p e t s or d i r e c t l y on t h e prepared yround surface, w i l l
be measured to the n e t t h i c k n e s s dimensioned on the drawings.
c) Concrete in a column supporting a reinforced concrete beam or s l a b s t r u c t u r e w i l l be measured between
t h e t o p surface of the foundation, beam, or s l a b on which the foot of the column is standing and the
underside of the beam or s l a b supported by the column.
d) No deduction or addition w i l l be made for nosings, bolt-holes, chamfers or splays of size up t o
50 mm x 50 mm, grooves or chases n o t exceeding 0,015 m3 each i i i volume, or holding-down b o l t s , r a i l s ,
s t e e l sections, and reinforcement c a s t i n the concrete.
Where the concrete is scheduled by voluine, it w i l l be measured on the mean
Concrete Complete with Formwork
separate items may be scheduled for concrete complete with formwork Cor each prescribed mix or f o r
s t r u c t u r a l u n i t s of s i m i l a r s i z e and shape, or for both.
The unit r a t e s s h a l l cover the cost of the provisiori of concrete (made with ordinary portland cement
unless otherwise scheduled), mixing, t e s t i n g , placing, compacting, the forming of stop-ends and
unforeseen construction j o i n t s , s t r i k i n g - o f f or levelling as applicable, and curing and repairing where
necessary, together with the cost of a l l p a r t s of formwork i n contact with the concrete aid the necessary
bearers, s t r u t s , and other supports, p l u s t h e layout and plant necessary to e r e c t and s t r i k e such
forinwork.
SCtlEDULED FOHMWORK ITEElS
R o u s ............................................................................... U n i t : m
The surfaces LU be so formed w i l l be i d e n t i f i e d i n the schedule.
Smooth .............................................................................. Unit: m
The surfaces to be so formed w i l l be i d e n t i f i e d i n the schedule.
Narrow Widths (up t o ..... nun wide) ................................................. Unit: m
The constant width, it in excess of 300 mm, or the range of widths i f up to 300 mm, or width and depth i n
the case of qrooves, w i l l be stated.
2
2
--
_-
~ - -
Box Out tloles/Form Voids
ltems w i l l be scheduled as s e t out below:
-- __
a) Small, circul_ar, of diameter up t o and including 0,35 m
1) - 0 , s m deep ................................................... Unit: N o .
2 ) 0,5 m 1,0 m deep ................................................... Unit: No.
3) e t c . , i n increments of 0,s m ..................................................... Unit: No.
b) Smell, other tiiaii c i r c u l a r , of area up to and including 0 , l )n- .................... Unit: No.
Depths as i n (a) above.
over and up to - and including
c) Larye, c i r c u l a r , of diameter over 0.35 m and up t o and including 0,7 m ............ Unit: N o .
Depths as i n (a) above.
-___
d) Large, other th2n c i r c u l a r , of area over 0,l mL and up to and including 0,5 mL .... Unit: No.
Depths a s i n (a) above.
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