125 Lake
Street
Parking Deck Structural Restoration • White Plains, NY
Parking Deck Structural Restoration
The North Tower parking garage at Stepping Stones Apartments had reached a critical state of deterioration. Aging reinforced concrete slabs, corroded steel beam connections, and compromised structural integrity demanded a comprehensive intervention — not a patch job, but a full structural rebuild of the garage and exterior ramp.
DeRosa Builders engaged L&M Roofing for the complete structural restoration scope: installation of new W12x50 steel columns with epoxy anchor systems, full concrete deck demolition and replacement with a new 6-inch reinforced slab on composite metal deck, waterproofing membrane systems, and a new asphalt driving surface. Every phase requires precision coordination with temporary shoring to maintain structural stability during active demolition.
Engineering the Restoration
A complex structural restoration requiring precision steel and concrete work coordinated with active shoring operations
New Steel Columns
W12x50 steel columns with custom 1" base plates, leveling nuts, and 3/4" epoxy anchor bolts set into existing footings with non-shrink grout beds
Structural Steel Beams
New steel beams installed per structural plans with bolted and welded connections to existing W36x160 girders and new columns
Concrete Deck Replacement
Sawcut and removal of deteriorated existing slabs, replaced with new 6-inch reinforced concrete on 1.5-inch composite metal deck with welded wire fabric
Concrete Repair & Crack Injection
Chip and remove deteriorated concrete to expose corroded reinforcing steel. Clean, treat, and patch to original profiles. Structural epoxy injection of all horizontal cracks
Beam Reinforcement
New 1/2" x 6" stiffener plates and 1" x 9" cap plates welded to existing W36x160 beams at critical load transfer zones and column connections
Waterproofing System
Full waterproofing membrane applied to the new deck surface to protect against moisture infiltration before the asphalt wearing course
Structural Shoring
Temporary shoring systems installed before any demolition to maintain structural stability of the multi-level garage throughout the reconstruction phases
Exterior Ramp Restoration
Complete structural repair of the exterior access ramp matching the garage deck scope — new beams, concrete slab on metal deck, and waterproofing
Asphalt Paving & Finishing
New 2-inch asphalt wearing surface installed over the waterproofed deck for vehicular traffic with proper slope-to-drain grading
Beyond Roofing — Structural Steel & Concrete
This project demonstrates L&M Roofing's capabilities far beyond traditional roofing. The scope includes structural steel erection, reinforced concrete construction, and precision demolition — work typically associated with general contractors and structural steel fabricators.
Every phase requires coordination with the structural engineer of record. From verifying existing footing capacities to certifying welded connections on W36x160 beams, this is heavy structural work executed with the same precision L&M brings to building envelope projects.
The Work in Progress
Concrete Deck Demolition & Structural Shoring
New W12x50 Column Installation
Composite Metal Deck Installation
Epoxy Anchor Bolt Installation
Beam Stiffener Plate Welding
Reinforced Concrete Deck Pour
Exterior Ramp Structural Restoration
Column Base Plate
Welded Connections
Epoxy Crack Injection
Reinforcing Steel Layout
Project Information
Need a Structural Restoration & Parking Deck Contractor?
55+ years of experience. MBE certified. Heavy structural capabilities.