Hail decides how a Front Range parking structure is used before it decides how it is built. Denver ranks 10th among U.S. areas of at least 50,000 people for hailstorm risk and has had three of the ten costliest U.S. hailstorms (July 1990, July 2009, May 2017). An open deck full of tenant or visitor vehicles is exposed to that risk, and an owner who knows it will often ask for covered levels, a structure that closes on the sides or a parking program that moves vehicles under cover first. We raise the question during programming, not after the deck has been drawn.
Parking structures are repetitive concrete and steel buildings with high exposure to weather, salt and vehicle loads. They serve hospital campuses, airports, mixed-use developments, transit stations, corporate campuses and municipal centers. Industrial buyers meet them as employee parking for a large plant or as the structure that sits beside a campus expansion. The construction method is closer to heavy civil work than to a typical building, and a team that schedules and inspects slab and pier work every day is suited to it.
We write for the owner's representative who must know the cost per space, the schedule to first car and the maintenance profile over a long service life.
Weather, salt and drainage over the life of the deck
Denver averages about 49 to 54 inches of snow per year depending on the station and period, and that means de-icing salts carried in on vehicles every winter. Chlorides attack reinforcing steel and post-tensioning tendons, so the durability of a deck is a function of cover, concrete mix, sealers and drainage. We specify low-permeability concrete, correct cover over steel, sealed joints, and a traffic membrane where the design calls for one, and we verify cover with a scan before the pour.
Drainage is the second durability item. Every level slopes to drains, and ponding is the starting point of most deck deterioration. Floor drains, trench drains and sand-oil separators for enclosed levels are coordinated with the plumbing contractor and tied into site drainage in line with our stormwater detention and drainage practice. Expansion joints are designed for thermal movement and detailed so water cannot track beneath them.
Fire protection, open versus enclosed, and local amendments
Whether a garage is open or enclosed under the code controls fire protection, ventilation and construction type. Commerce City adopts the 2021 International Building Code as the City of Commerce City Construction Code, with 49 local amendments, including sprinklers throughout S-2 parking garages. That is a clear example of a local amendment changing cost: a fire sprinkler system in a deck adds piping, a fire pump or tank in some cases, and freeze protection on any exposed levels.
Other jurisdictions take different positions, and the edition in force depends on the city and the filing date. We obtain a written code analysis early, confirm the open-garage determination with the building official, and check requirements for standpipes, emergency lighting, accessible routes, vehicle barriers and elevators. Fire access, hydrant locations and site lighting and electrical work around the deck are reviewed with the fire authority and the utility.
Structure, ramps and the systems inside the deck
Structural systems for decks include cast-in-place post-tensioned concrete, precast concrete and, in some cases, structural steel with a composite deck. Each has trade-offs: post-tensioning gives long spans and thin slabs but requires careful coordination of penetrations; precast speeds erection and gives controlled quality but needs a crane pad, a staging yard and detailed connections; a steel frame brings erection speed, as covered by our structural steel erection work, and needs good coatings for corrosion protection. We compare options on cost, schedule and durability.
Inside the structure we install foundations, columns, slabs, ramps, stair and elevator cores, guard systems, lighting, signage, striping, access control and sometimes electric vehicle charging infrastructure. Conduit and capacity for charging are far less expensive to install during construction than to add later, so we recommend roughing in the electrical service even if the equipment will be added in phases.
Access, staging and first-car date
A parking structure often sits on a tight urban or campus site with limited laydown area. The schedule is built around site access, crane placement and deliveries of precast or steel, plus the cure time for concrete placements. We sequence the foundation work so that columns and the first level can go up while later foundations are still being drilled, and we maintain access to adjacent buildings throughout.
When a deck serves a project under construction, such as a hospital addition, a mixed-use building or an office, the opening date is tied to the opening of the main building. For hospital work, our healthcare and hospital page describes how parking is phased with the campus. For residential and retail projects, parking is built as part of the podium described on the multifamily and mixed-use page.
Airports, transit and growth centers
Parking demand follows travel and employment. Denver International Airport set a passenger record of 82,427,962 in 2025, and its Operation 2045 plan proposes four new concourses with about 100 more gates by 2045. Growth at that scale puts pressure on the surrounding access roads, rental car facilities, employee lots and the freight users we cover under logistics and distribution. We build in the airport area with a clear view of how traffic and freight share the corridor.
Transit stations also generate parking. RTD's E and R light rail lines have five Lone Tree stops, and the RidgeGate Parkway station is the southernmost on the system after the extension opened in 2019. Park-and-ride demand at stations like that, and at commuter rail stations in northern suburbs, supports structured parking where land is expensive.
Send the space count and the site
Give us the space count, the site constraints and the opening date. We will return a structural system comparison with cost per space and schedule for each.
Common Questions
Is precast or cast-in-place post-tensioned concrete better for a deck?
It depends on the site. Precast erects quickly and has factory quality control but needs crane access and staging area. Post-tensioned cast-in-place suits irregular footprints and tight sites but takes longer in the field. We price both with the same layout and compare cost per space and schedule.
How do you protect a deck from salt damage?
By design and quality control: low-permeability concrete mix, adequate cover over the reinforcing steel, sealed joints, a traffic coating where specified and well-drained surfaces. Cover is verified by scan and recorded. The owner should also have a maintenance plan that includes washing and joint resealing.
Does a parking structure need sprinklers?
It depends on whether the code considers the garage open, the building height and area and the local amendments. Commerce City, for example, amended its code to require sprinklers throughout S-2 parking garages. We obtain a written code analysis early and design the system accordingly.
Should we rough in electric vehicle charging during construction?
Yes, at least the conduit, panel space and utility capacity. Running conduit through finished slabs is expensive, and installing it before the pour is cheap. The chargers themselves can be added in phases as demand grows.
How long does a parking structure take to build?
It varies with size, structural system and site constraints, so we do not quote a standard duration. We prepare a schedule at preconstruction that shows foundations, structure, waterproofing, mechanical and electrical, and finishes, with the long-lead items identified.