You need Denver concrete experts who engineer for freeze–thaw, UV, and hail. We require 4,500–5,000 psi, air‑entrained mixes (w/c ≤0.45), #4 rebar at 18" o.c., Class 6 bases compacted to 95% Proctor, and saw https://nicolastkoh622680.techionblog.com/38608148/expert-concrete-work-in-denver-co