Answer / santosh singh

types of ladder or staircase are
1 dog legged
2 quarter turn
3 half turn open well
4 bifurcated
5 semi elliptical
6 geometrical
7 circular
8 3-quarter turn open well

they may be
1) cantilever staircase
2)stair spanning longitudinally
3) stair spanning horizontally between stringer beams
4) stairs with only riser and tread

Answer / mohan.civil

1) wooden ladder
2) steel ladder

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