Iibhalustra zeglasi ezingenasikhelo ziye zanda kakhulu kwiminyaka yamva nje ngenxa yesibheno sazo sobuhle obuncinci kunye nesimanje kuyilo lwangoku.
Ngokuqhelekileyo, iibhalustra zeglasi ezingenafreyimu zibonwa kwizicelo zangaphandle ezinje nge-balcony railings, kodwa oko akuthethi ukuba zibandakanywe kuphela kuyilo lwangaphandle. Ngaphakathi, ii-balustrade zeglasi ezingenasiphako zongeza uchuku lwale mihla kwizitepsi zokukhwela, umzekelo, kunye nokubonelela ngendlela yokuyila yokuhambisa ukukhanya kuzo zonke iindawo zokuhlala zangaphakathi.