Il-ħxuna tal-web (flanġijiet li jgħaqqdu sezzjoni vertikali) tvarja skont l-għoli għall-azzar tal-kanal PFC Awstraljan, li tvarja minn 3.5 mm (PFC 75) sa 12.5 mm (PFC 400):
Daqsijiet żgħar tal-PFC: PFC 75 (ħxuna tal-web ta '3.5 mm), PFC 100 (ħxuna tal-web ta' 4.0 mm)
Daqsijiet PFC medji: PFC 200 (ħxuna tal-web 6.0 mm), PFC 250 (ħxuna tal-web 7.0 mm)
Large PFC sizes: PFC 350 (10.0 mm web thickness), PFC 400 (12.5 mm web thickness)The web's primary role is to resist shear forces (e.g., wind, seismic activity). Thicker webs provide higher shear capacity, making large PFC channels (e.g., PFC 400) suitable for short-span, heavy-load applications (e.g., industrial crane supports in Western Australia's mining sector). AS/NZS 3679.1 specifies web thickness tolerances: ±0.4 mm for thicknesses ≤5 mm, ±0.5 mm for 5.1–10 mm, and ±0.6 mm for >10 mm. Dawn it-tolleranzi jiżguraw li l-web tista 'tittrasferixxi b'mod affidabbli forzi ta' shear bejn il-flanġijiet, u tevita falliment prematur.