Ivamise ukubizwa ngokuthi i-rack-type rack, futhi ikakhulukazi yakhiwe ngamashidi ekholomu, imishayo kanye namadekhi aphansi.Ifanele izimo zokuthwebula mathupha, futhi umthamo wokuthwala umthwalo werack uphakeme kakhulu kunalowo werack ye-Type I yosayizi omaphakathi.