CHI 3295 Sectional These CHI commercial garage doors are “full view” with windows on each panel. The durability and functionality of these doors offset the industrial-contemporary look. They feature 2” thick hollow aluminum rails with section material made of... CHI 3222 Sectional The CHI 3222 Sectionals are ribbed steel commercial garage doors. Their 20-gauge steel sections are 2” thick and hot-dipped galvanized. Insulated with steel black, they contain a 1 ½” thick polyurethane lining. Insulating R-value of... CHI 3216 Sectional Model 3216 micro-grooved commercial garage doors are both functional and durable. The foamed-in-place polyurethane keeps these doors efficient. And individually calibrated springs make sure each door is working properly. Each section conceals steel... CHI 3236 Sectional CHI 3236 commercial garage doors are durable and efficient. The galvanized coating comes in a selection of color options. And the plain insulated windows allow for a view of operations.