River City Welding provides professional RTU structural reinforcement services throughout the St. Louis Metro area, ensuring rooftop HVAC units are properly supported, stabilized, and compliant with structural requirements. We build and install custom steel RTU curbs, frames, dunnage, and reinforcement systems designed to handle equipment weight, vibration, wind load, and long-term roof conditions.

Our RTU reinforcement services include:

• Custom steel RTU support frames and dunnage

• Rooftop unit curb reinforcement and modifications

• Structural steel load distribution systems

• Vibration-resistant and wind-rated steel supports

• Field-fit fabrication for existing rooftops

• Retrofit reinforcement for aging or undersized supports

• Coordination with HVAC contractors and roofers

We specialize in on-site fabrication and installation, allowing precise fit-up to existing roof structures without unnecessary removal or downtime.

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River City Welding provides complete steel stair and mezzanine fabrication and installation services throughout the St. Louis Metro area, delivering safe, durable, and properly constructed access systems for commercial, industrial, and multi-family properties. We design, build, and install custom structural steel stairs, landings, platforms, and mezzanines tailored to your space, load requirements, and operational needs.

Our services go beyond welding — we handle the full structural build, from layout and fabrication to erection and permanent installation.

Steel Stair Construction Services

We fabricate and install:

• Interior and exterior steel stair systems

• Industrial stairs and access stairways

• Equipment access stairs and platforms

• Stair stringers, treads, risers, and landings

• Structural stair framing and supports

• Custom steel stair modifications and expansions

Each stair system is built for strength, stability, and long-term use, with proper rise, run, and structural support.

Mezzanine Fabrication & Installation

River City Welding builds custom steel mezzanines and platforms designed to increase usable space and improve workflow. Our mezzanine services include:

• Structural steel mezzanine framing

• Equipment and storage platforms

• Elevated work platforms

• Load-bearing columns, beams, and decking support

• Mezzanine stair and ladder integration

• Retrofit mezzanines for existing buildings

All mezzanines are constructed with load distribution, structural alignment, and real-world use in mind.

On-Site Fabrication & Structural Installation

Our mobile fabrication capability allows us to field-fit stairs and mezzanines directly on your jobsite. This ensures:

• Precise integration with existing structures

• Proper alignment and leveling

• Reduced downtime and faster installation

• Minimal disruption to operations

We coordinate closely with contractors, facility managers, and other trades to deliver smooth project execution.

Commercial & Industrial Applications

We build steel stairs and mezzanines for:

• Warehouses and distribution centers

• Manufacturing and industrial facilities

• Commercial buildings and retail spaces

• Apartment complexes and mixed-use properties

• Mechanical rooms and equipment access

Built for Safety, Strength & Longevity

Nomad Welding prioritizes:

• Structural integrity and load capacity

• Clean fit-up and professional installation

• Stable, vibration-resistant construction

• Jobsite safety and coordination

• Durable materials and workmanship

Our goal is to deliver stairs and mezzanines that perform safely under daily use.

Structural steel framing, repair, and new construction services in St. Louis Metro. River City Welding provides complete steel structure fabrication, erection, and installation for cladded steel buildings, metal canopies, pergolas, steel sheds, equipment enclosures, and custom steel constructions. We specialize in both structural repairs and full new builds, addressing damaged, undersized, or aging steel as well as ground-up construction projects.

Our services include steel columns, beams, rafters, purlins, girts, bracing, moment frames, base plates, anchor systems, and load-bearing supports, all built to integrate with metal panel cladding, architectural finishes, and weather-resistant building envelopes. For repair projects, we provide structural reinforcement, section replacement, corrosion mitigation, impact damage repair, and retrofitting to extend the life and safety of existing steel structures.

River City Welding offers on-site fabrication and field installation, allowing precise fit-up to existing buildings and site conditions without unnecessary demolition or downtime. Our steel framing solutions support commercial, industrial, municipal, and residential applications, including warehouses, retail buildings, apartment complexes, outdoor structures, and specialty steel assemblies.

Proudly serving the Greater St. Louis Metro area, including St. Charles, St. Peters, O'Fallon, Wentzville, Chesterfield, Maryland Heights, Bridgeton, St. Louis, and surrounding communities, River City Welding LLC delivers code-compliant, structurally sound steel fabrication and installation built to withstand Missouri's demanding weather conditions and the rigors of long-term commercial and industrial use. From structural steel erection and field welding to custom fabrication and permanent installations, we provide durable solutions that meet AWS D1.1 standards while emphasizing safety, quality, and lasting performance.

Structural steel repair, modification, and field adjustment services throughout the Greater St. Louis Metro area. River City Welding LLC specializes in structural steel repairs, reinforcements, retrofits, and on-site modifications for commercial, industrial, manufacturing, and multi-family properties. We correct damaged steel members, misaligned connections, fatigue cracking, corrosion, impact damage, and structural deficiencies, restoring strength and integrity while minimizing the need for complete replacement.

Our structural repair services include beam and column reinforcement, member replacement, connection upgrades, base plate and anchor bolt modifications, structural realignment, load-path corrections, weld repairs, and retrofit strengthening. We also perform field modifications to accommodate design revisions, equipment installations, tenant improvements, code compliance upgrades, and unforeseen conditions encountered during construction or facility maintenance.

With fully equipped mobile welding and fabrication capabilities, River City Welding LLC performs precision field welding and steel fabrication directly on-site, reducing downtime and eliminating the need to transport large structural components. We provide repair and modification services for steel buildings, mezzanines, equipment platforms, canopies, stair systems, handrails, HVAC and mechanical supports, RTU frames, carports, and miscellaneous structural steel.

Proudly serving St. Charles, St. Peters, O'Fallon, Wentzville, Chesterfield, Maryland Heights, Bridgeton, St. Louis, and surrounding communities throughout St. Charles County, St. Louis County, Jefferson County, and Franklin County, River City Welding LLC delivers code-compliant structural steel solutions built to meet AWS D1.1 standards and engineered for long-term performance, safety, and reliability.