Ma bawuti amatanthauzidwa mu ANSI B1.13M ya Grade 6 g tolerances.Zinthu za bolt zimayenderana ndi ASTM F568M ya Kalasi 4.6.Zopangira ma bolt osamva dzimbiri zimayenderana ndi ASTM F 568M ya Gulu 8.83.mabawuti.Chithandizo chapamwamba chidzatsata AASHTO M232.
Kukula kwabwino kwa makina ochapira ndi 76 * 44 * 4mm, ndipo tikhoza kutsata zojambula kuchokera kwa kasitomala.
Kwa chowonetsera mtundu nthawi zonse kukhala woyera, wofiira, ndi wachikasu, mukhoza kusakaniza nokha.
Ma bolts ndi mtedza amalinganiza kumangiriza guardrail, positi, spacer mu gawo limodzi.
Chowunikiracho chimatha kuwonetsa kuwala pomwe anthu amayendetsa galimoto usiku, Ndizimenezi mutha kupeza mosavuta m'mphepete mwa njanji.Ikhoza kuchepetsa ngozi inachitika.
Mtsinje wa transaction umakhazikika pakati pa w mtengo ndi matabwa atatu.