[quote=dunsuntutmybuntut,Sep 20 2009, 07:21 PM]

Y- stand for high tensile steel. R- round steel
and the no behind indicate the diameter of the rebar

BRC are the rebar pre-welded together at factory. these will save the labour cost for the barbender.

normally 6m or approximatelly 20 feets are taken into consideration. But for your case, the land areas should be the major consideration. Hence column in the centre is unavoiable. For cost saving, maintain multiple sets of 6m x 4.5m retangular. where at every edge, a column are required.

to maintence the control room size, just create a mezzanise floor on top of the control room. in these the room height 1.85m will do, then on top of the room can be use as nesting place. 1.5m height between the mezzanise floor and the ceiling height the bird will made nest there.

regards,
xunji

[quote=West Wing,Oct 25 2009, 02:03 PM]
IMALAYSIA and hope that there is no IMALAYSIA 1st.Class, 2nd. Class and 3rd.Class........................a true Malaysian race; united, one for all and all for one.

...............Hidup bangsa Malaysia... satu Malaysia, satu jiwa dan satu bangsa




turn nightmare into dreams,and make ur dreams into good reality!jz a matter of perspective

When gov people no respect bh farmer , why bh farmer want to respect them!!!!!!!! Give good example to farmer when gov want farmer to respect gov^_^

since yr width is 30' X 10' , instead the staircase along with the wall length, my suggestion is to partition another wall into two section, section a = 20' x 10' and section b = 10' x 10'.

so left section a as void, and section b be z-type staircase.

additional cost only a panel wall.