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Spans
These are the most advanced
telescopic centering systems that basically used to support floor forms
while laying slabs. This versatile system can easily be used and
erected by unskilled labour. It virtually eliminates vertical propping
and permits free space beneath the spans.
Spans comprise of an inner and an outer lattice members as illustrated. A
combination of inner and outer lattice members of sizes indicated below
can bridge spans as small as 1892 mm to as. large as 5510 mm.
Member
|
Member Designation
|
Length (mm)
|
Extra Short Outer
|
ESO
|
1575
|
Short Outer
|
SO
|
2400
|
Long Outer
|
LO
|
3100
|
Extra Short Inner
|
ESI
|
1750
|
Short Inner
|
SI
|
2500
|
Long Inner
|
LI
|
3000
|
On having decided the combination
of lattice members best suited to give the required span and the size
of the floor form, the lattice members are telescoped to achieve the
required span and locked into position by means of the 'I' bolts
provided at ends of the outer lattice member.
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