Your Trusted Source
for Architectural
Materials.
From specification and structural calculations to final installation — ASI STL delivers specialty architectural systems with a zero punch list standard.
The architecture of
reliable delivery.
Combining technical expertise with white-glove project management for specialty architectural systems across the Midwest.
Single-Source Responsibility
From design and specification through structural calculations to final installation — one partner, zero gaps. We eliminate coordination failures between trades.
Certified Structural Calculations
In-house structural engineering capability for all specialty systems. PE-stamped calculations delivered with every specification package — no third-party delays.
Zero Punch List Standard
Our quality-first installation process means projects close on schedule with no outstanding items — every time.
Named Manufacturer Partnerships
Authorized rep for Super Sky Products, P&P Artec, Plasteco — specialty products unavailable through general distributors.
CSI Specification Support
Full CSI MasterFormat spec sections — Section 057200, 086200, 133413 and more — ready to drop into your project documents.
St. Louis Local
Deep regional roots in the St. Louis metro — fast response times, on-site visits, and a track record of local landmark projects.
Specialty systems
built to spec.
Skylights & Glazed Roofing
Custom-engineered skylight systems from Super Sky Products — from simple flat-glass units to complex curved structural glazing.
Architectural Railings
Engineered metal and glass railing systems for stairs, balconies, and mezzanines — structurally calculated and code-compliant.
Sunshades & Louvers
Exterior solar control systems that reduce energy loads while enhancing facade aesthetics. Engineered for Midwest climate loads.
Glazed Canopies & Entries
Structural glass and metal canopy systems for building entries, walkways, and covered outdoor spaces.
Specialty Glass Systems
Switchable privacy glass, cast glass, glass floors/treads, silkscreened interlayers, and digitally printed architectural glass.
Space Frames & Structures
Long-span structural space frame systems for large-scale roof and canopy applications — engineered for maximum efficiency.
The difference between
a supplier and a partner.
Architectural Systems of St. Louis isn't a catalog company. We're a specialty systems partner with 30+ years of hands-on expertise — personally led by Jack Mahaney on every project.
Design Through Installation
We don't just supply — we specify, engineer, and install. Full accountability from first drawing to final inspection.
In-House Structural Engineering
PE-stamped calculations for every system. No third-party delays, no liability gaps between engineer and installer.
Architect-Ready Specifications
CSI MasterFormat sections delivered for every product — drop directly into your project manual with confidence.
Regional Market Knowledge
St. Louis-based with deep knowledge of local codes, climate loads, and the contractor/design community.
Systems built to
last a generation.
From St. Louis landmarks to regional healthcare facilities — real projects, real systems, real results.
Downtown St. Louis Office Tower
Regional Medical Center Atrium
University Science Building
Convention Center Expansion
Start your project
with a conversation.
Jack Mahaney responds personally to every inquiry. Tell us about your project and we'll get back to you within one business day.
Every quote is reviewed personally. Expect a direct, technical response — no sales scripts.