Beams and slabs carry your building. When they start to crack or sag, the fix can't wait. We restore structural members to spec — minimizing disruption to tenants and operations.
Beam and slab repair in Fort Lauderdale is precision structural work that directly affects the load-carrying capacity of a building's floor and roof systems. Cracked, deflecting, or spalling beams and slabs in South Florida's concrete-frame buildings are the product of rebar corrosion, impact damage, overloading, and decades of moisture exposure — all amplified by the coastal climate. At Planet Construction FL, we restore beams and slabs to structural adequacy using FDOT-approved repair systems and, where required, carbon fiber reinforcement that upgrades capacity beyond the original design.
We chip a minimum 3/4-inch clearance behind oxidized steel bars to guarantee total mechanical bonding with cathodic zinc primer and repair mortar.
Engineered multi-tier shoring towers support overhead cantilevered slabs before any concrete chipping begins, safeguarding building integrity.
Ground-penetrating radar scanning accurately locates live post-tension cables and electrical conduits before any mechanical chipping or coring takes place.
Beams and slabs are primary structural elements — and when they crack, sag, or spall, the building's load path is compromised. The damage rarely stops on its own. What starts as a hairline crack becomes a deflection issue, then a capacity issue, then an emergency. Operating around damaged structural members puts tenants, occupants, and your insurance status at risk.
We work directly from engineering specifications, using proper formwork, repair mortars, and reinforcement to restore beams and slabs to original capacity. Where possible, we sequence work to keep your operations running. Every step is photographed and documented for the engineer of record, so the repair is fully traceable from start to finish.
Concrete beams and slabs in Fort Lauderdale's multi-story buildings deteriorate in predictable patterns. Flexural cracking — cracks perpendicular to the beam's long axis at midspan — occurs as beams deflect under sustained loading and signals structural stress or overload. Diagonal shear cracks at 45-degree angles near beam ends are more serious structural indicators. Slab spalling on the underside signals rebar corrosion directly above the concrete cover, exposing reinforcement and reducing load capacity. Post-tensioned slabs — common in South Florida's residential buildings — present unique failure modes when tendons corrode or break, producing visible cracks and sometimes audible sounds as strands rupture. All of these conditions require professional assessment before repair begins.
TRANSFER GIRDERS
Pneumatic hydro-demolition of delaminated web concrete, supplementary rebar cage splicing per ACI 318, and form-and-pour micro-concrete casting under full dead-load hydraulic shoring.
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ELEVATED SLABS
Full-depth and partial-depth slab spall remediation, vehicular traffic deck restoration, expansion joint rebuilding, and bottom soffit overhead patch repairs.
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FIBER COMPOSITES
High-modulus carbon fiber fabric and structural epoxy saturation to dramatically upgrade shear capacity and flexural moment strength of deflected beams without adding dead weight.
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POLYMER MORTARS
Precision timber formwork, port installation, and pressure-pumping shrinkage-compensated polymer micro-concrete achieving over 7,500 PSI to restore original cross-sectional dimensions.
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CRACK WELDING
Setting injection ports along 45-degree shear fissures, capping with surface epoxy, and hydraulically injecting ultra-low viscosity resin up to 250 PSI to fuse fractured concrete monolithically.
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POST-TENSIONING
Locating unbonded post-tension cables via GPR, chipping deteriorated anchor blowout pockets, splicing broken strands with PTI-certified couplers, and re-greasing protective sheathing.
Discuss Tendon Inspections →Beam and slab repair without proper structural assessment risks an inadequate or inappropriate repair — particularly in post-tensioned systems where standard chipping can damage tendons still under load. Planet Construction FL begins every beam or slab repair project with a thorough assessment: documenting crack patterns, measuring deflection where accessible, reviewing available structural drawings, and determining whether the damage results from a past event or an ongoing condition. Where the structural condition warrants engineering review — which covers most structural beam and slab conditions — we coordinate with licensed structural engineers before committing to a repair approach. The assessment protects both the building and our work.
Structural beam and slab restorations require coordinated engineering, heavy hydraulic shoring, pneumatic chipping, and precision concrete casting. Dividing responsibilities across multiple subcontractors creates finger-pointing, permit delays, and compromised structural safety.
Hiring separate shoring suppliers, chipping subcontractors, and concrete repair crews leads to catastrophic miscommunications. If a beam deflects, the shorer blames the concrete chipper, while the engineer halts work and costs spiral.
John Kraja directly manages the entire structural restoration workflow under Florida license CGC1517295 & CCC1329271. Our dedicated crews erect hydraulic shoring, chip spalls, splice rebar, cast micro-concrete, and coordinate special inspections under one roof.
We pull commercial structural permits directly with Fort Lauderdale, Pompano Beach, Hollywood, Boca Raton, and Palm Beach building departments. We coordinate daily Threshold and Special Inspector sign-offs to keep work moving fast.
Beam and slab repair methods are selected based on damage type and cause. Spalling and rebar corrosion on beam and slab soffits is addressed with full concrete removal to the damage boundary, rebar treatment, and FDOT-approved overhead mortar application. Structural cracks in beams and slabs receive epoxy injection — bonding the crack faces and restoring structural continuity. Where beams or slabs have experienced section loss or require capacity upgrades, carbon fiber reinforced polymer (CFRP) laminates are bonded to the tension face, providing significant flexural strength enhancement without added weight or disruption to the floor above. Each method is selected based on engineering specifications and the specific damage condition — not a one-size-fits-all approach.
Technicians use Ground-Penetrating Radar (GPR) to map internal post-tensioned cables, live conduits, and delaminated concrete planes, producing exact shoring layout plans.
Crews erect calibrated multi-tier hydraulic shoring towers with load-spreading sill plates to relieve dead and live loads before any concrete chipping or coring begins.
Chipping a full 3/4-inch clearance behind corroded rebar, sandblasting steel to bare white metal (SSPC-SP 10), splicing loss over 20% per ACI 318, and applying zinc primer.
Erecting rigid formwork, applying epoxy bonding agent, and pumping high-strength polymer-modified micro-concrete (>7,500 PSI) with integrated shrinkage compensation.
Conducting cylinder break compression tests, de-tensioning shoring jacks in calculated stages, and securing final municipal building department threshold inspection sign-off.
CFRP laminate strengthening has become the preferred method for increasing beam and slab flexural capacity in occupied buildings where conventional strengthening would require major demolition and disruption. Laminates are bonded to the tension face of the beam or slab with structural epoxy — thin, lightweight, and completely non-corrosive. They add significant load capacity without altering the beam's height or profile. For Fort Lauderdale building owners facing 40-year recertification deficiencies, occupancy increases, or conversion projects that add load to existing beams, CFRP strengthening delivers a code-compliant capacity increase with minimal disruption and a competitive project cost compared to conventional strengthening alternatives.
Phased construction logistics, resident notices, reserve study alignment, and direct engineer of record milestone recertification sign-offs.
Documented case studies showcasing engineered structural repairs across Broward and Palm Beach County properties.
Installed heavy multi-tier hydraulic shoring across three parking levels, chipped 480 linear feet of delaminated beam web, and poured 8,000 PSI micro-concrete with zero tenant disruption.
Executed full-depth form-and-pour micro-concrete jackets and high-pressure epoxy injection for exterior perimeter beams exhibiting severe salt-fog corrosion and diagonal shear cracks.
Remediated structural slab spalls, re-spliced bottom reinforcement bars, and applied elastomeric moisture membranes across 6-story exterior residential corridors on schedule.
Clear answers regarding engineering specifications, municipal code compliance, and structural concrete restoration standards.
Not all beam cracks are structural emergencies, but all warrant evaluation. Hairline flexural cracks at midspan under long-term load are common in older concrete beams. Diagonal cracks near beam ends, cracks wider than 1/16 inch, cracks accompanied by visible deflection or sagging, and any crack in a post-tensioned beam should be assessed by a licensed structural professional immediately — these are not situations to observe and wait on.
In most cases, yes. Overhead soffit repairs are performed from below using scaffolding or aerial lift equipment. The floor above typically remains in use throughout. For post-tensioned slab repairs, the structural engineer may specify load restrictions during specific repair phases. All requirements are communicated clearly before work begins so property managers can plan appropriately.
For repairs to structural beams and primary floor slabs in multi-story buildings, engineering oversight is strongly recommended and often required by the building department. We work alongside structural engineers throughout the assessment and repair process. For straightforward soffit spall repair in non-critical locations, engineering may not be required — we assess each project's requirements individually.
A properly repaired and protected concrete beam or slab — with rebar corrosion treated, mortar applied to specification, and a protective coating system installed — can be expected to perform for the remaining service life of the building. The key factors are eliminating the moisture source that drove the original deterioration and applying appropriate surface protection to prevent re-exposure of the repaired zone.
Schedule a structural assessment. We'll review your engineer's report, scope the work, and give you a clear timeline — free of charge.
Speak directly with John Kraja, Qualifying Contractor (CGC1517295 & CCC1329271). We respond within 15 minutes during business hours.
(754) 301-6747
