Sobanura ingaruka z 'urukuta rwa radiyo' ($ b $) itandukaniro mugukwirakwiza impagarara mumasoko ya Crest-to-Crest.

Urukuta rwa radiyo $ b $ nubugari bwinsinga iringaniye ikoreshwa mugutobora isoko. Mu kugereranya guhangayika $ \ sigma = (6 \ cdot P \ cdot D_m) / (n ^ 2 \ cdot b \ cdot t ^ 2) $, imihangayiko ihwanye na $ b $. Urukuta runini rwa radiyo rugabanya guhangayikishwa n'umutwaro watanzwe $ P $, bityo ubuzima bwumunaniro bukiyongera. Nyamara, mugari $ b $ nayo yongera igipimo cyimpeshyi $ k $ hamwe nuburebure bukomeye bwimpeshyi. Byongeye kandi, niba $ b $ ari nini cyane, 'kwaguka kwa radiyo' mugihe cyo kwikuramo bigenda bigaragara cyane, byongera ibyago byo kwivanga mumazu. Abashushanya bagomba kuringaniza $ b $ kugirango bagere ku $ k $ bifuza mugihe bagumya guhangayikishwa nimbibi zemewe zishusho ya Goodman kubintu byatoranijwe.