Dear Khawar,
As required, please find below the picture of SAAAN / NARIAL MUTHAAA. This is being dipped to plaster of paris then slurry type material is pasted around wire with which ceiling is hanging.

If iron wire is used in ceiling then it will tend to corrode/weak with passage of time. Advise your ceiling guy to use JISTI wire only in ceiling. Following is an image in which you can see SAAAN/NARIAL MUTHAAA is pasted around ceiling wire.

You can contact Mr.Aamir (Ceiling Guy 0342 6066 008), he recently completed ceiling work in F=15 ISB of my one Friend. His work was good and rate was also reasonable. Now days , designed glass also placed in ceiling. You can also adopt this as well, have a look on below pics;


Wood is of many type;
Diyaar
Marrandi
Pakistani Kail
Ash Wood/Yellow Pine
Imported Kel, Taali, Jaman and many other....................
Diyaar is most famous and considered as less termite loving wood. Selection depends upon economic basis (fairly speaking). So it depend upon what you afford infact. In middle range Ash wood and Imported Kail are ok.
Marrandi , Diyaar and Pakistani Kail is in higher end.Wood work total cost depends entirely on your taste. e.g. kitchen starts from Labour Rate 250Rs Per Sq Ft and goes upto 550 RS Per Sq Ft. Costliest kitchens are made of UV sheets. Same is the case in lieu of door (full wood, with glass design,ply doors, doors height) and Cupboards (full box, only frame, profile glass based, UV sheets) making. Main thing is what you like.
ISB is costly w.r.t hardware and in Pindi (City Saddar) rates are also high with limited variety. If possible for you, just visit Beadon Road Lahore, and get all Kitchen Cabinets + Complete Home Hardware from Alpha Traders/ Naeem Traders. You can save 25% in total if you shop from Lahore. And simply go for Half Body Lock, dont use full body lock. Its now obsolete. If Lhr visit not possible for you then please visit Kiani Hardware (near Chandni Chowk) and City Saddar Road.
W.r.t carpentary / wood work , you have to search the good team by your self as per your taste. So far, even after many wood works in ISB/Pindi through local persons , we can not recommend a local good team . Wood working is of average level in ISB and main reason is new comers claim themselves very expert workers, but in fact they are not.