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Structural Concrete Contractor in South Florida

Engineered foundations, slabs, columns, beams and shear walls — built to Florida Building Code for hurricane-zone performance.

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Overview

Professional Structural Concrete Services Across South Florida

Structural concrete is the skeleton of every building in South Florida — the footings, slabs, columns, beams and shear walls that carry every load a structure will ever see, from gravity and live loads to hurricane-force wind uplift and lateral pressure. In Broward County, Miami-Dade County and Palm Beach County, that structural package is scrutinized by some of the strictest building departments in the United States, and for good reason. A foundation mistake that would be forgiven in a mild climate becomes a catastrophic failure when a 140 mph Category 4 storm passes over Fort Lauderdale or Coral Gables. Nest Concrete builds structural concrete for custom homes, mid-rise multifamily, light commercial, warehouse, retail and industrial projects across the tri-county region. We work from sealed structural drawings, we pour to Florida Building Code 2023 and ACI 318 standards, and we document every pour — mix tickets, slump tests, cylinder breaks, inspection sign-offs — so the permit package closes cleanly and the building department has no reason to slow your project down. Whether you are a general contractor putting up a new warehouse in Davie, an owner-builder framing a custom home in Coral Springs, or a property manager retrofitting a Plantation office building, this is the category of work where execution matters most.

South Florida's structural concrete stack looks different than it does anywhere else in the country. The region sits on a limestone shelf topped with a thin blanket of sandy fill and, in some pockets, expansive marl clay. The water table is high — sometimes within 18 inches of grade near the Intracoastal — and the design wind speed for most of the tri-county region runs between 165 and 180 mph under ASCE 7-22, with Miami-Dade's High-Velocity Hurricane Zone (HVHZ) adding Notice of Acceptance (NOA) product approval requirements on top of everything else. That environment drives real engineering decisions. Spread footings are typically wider and more heavily reinforced than they would be on firmer soils. Stem walls are the dominant foundation-to-slab detail because raising finished floor above base flood elevation (BFE) is non-negotiable in most flood zones. Post-tensioned elevated decks are specified on mid-rise projects to control deflection and reduce cracking in our aggressive salt-air environment. Shear walls and tie-down systems are engineered for lateral loads that would be unimaginable in inland states, and every vertical load path must terminate cleanly into an engineered footing. Our crews handle the full structural scope: excavation and layout, forming (conventional lumber, aluminum modular, ICF where specified), reinforcement placement (Grade 60 rebar, epoxy-coated where corrosion exposure warrants, stainless in splash zones), pouring, consolidation, finishing and curing. We coordinate with the structural engineer of record on mix design, pour sequencing and cold-joint locations, and we maintain a standing relationship with local ready-mix suppliers to guarantee pump-grade delivery windows on tight urban sites in Fort Lauderdale, Miami and West Palm Beach. Every structural job is a collaboration between the engineer, the GC and our crew, and we run it that way from pre-con through final inspection.

What We Handle

Structural Concrete Services We Provide

01/ 08

Foundations (Spread Footings & Strip Footings)

The foundation is where every structural decision either pays off or catches up with you. In South Florida, spread footings and strip (continuous) footings are the workhorses of residential and light commercial construction — cast below grade, sized by the structural engineer based on bearing capacity, and tied cleanly into the stem wall or slab above. We install spread footings for isolated column loads on warehouse and commercial projects across Broward and Miami-Dade, typically pouring 3,000 to 4,000 PSI mixes into formed excavations that have been compacted to 95% modified Proctor. Strip footings run continuously beneath load-bearing walls for residential new construction in Coral Springs, Davie, Weston and Pembroke Pines — usually 16 to 24 inches wide and 10 to 12 inches deep on residential, deeper and wider on commercial. Reinforcement is Grade 60 deformed bar, sized per the structural drawings, with proper lap splices, corner ties and hook lengths at terminations. For renovation and addition work in older neighborhoods of Fort Lauderdale, Hollywood and Coral Gables, we often install underpinning piers or thickened-edge additions that tie into existing foundations. That requires careful excavation to expose the existing footing, epoxy-doweled reinforcement to create a structural connection, and a mix design that matches the legacy concrete as closely as practical to avoid differential movement. Every footing pour is inspected by the local building department before concrete is placed — open-hole inspection is mandatory in Miami-Dade and Broward — and we schedule, stage and document the inspection so your project does not lose a day waiting on the inspector.

Common Applications

  • Spread footings for steel column loads on warehouse and industrial projects
  • Continuous strip footings beneath CMU and wood-framed bearing walls
  • Thickened-edge footings integrated with monolithic residential slabs
  • Underpinning piers for additions and structural renovations
  • Grade beam footings tied between pile caps on poor-soil sites
  • Elevator pit footings and sump foundations
  • Isolated footings for pergolas, gazebos and outdoor kitchens
  • Retaining wall footings for terraced lots in Coral Gables and Boca Raton

Technical Specs & Details

  • 3,000 to 4,000 PSI concrete mix, ASTM C94 ready-mix per engineer specification
  • Grade 60 (ASTM A615) deformed rebar, sized and spaced per sealed structural drawings
  • Minimum 3 inches of concrete cover over rebar where cast against earth
  • 95% modified Proctor compaction on sub-base prior to pour
  • Minimum 12 inches embedment below finished grade on most residential work
  • Open-hole inspection required by Broward, Miami-Dade and Palm Beach building departments
  • Moisture barrier and termite treatment coordination with pest control trade
  • Bearing capacity verified by geotechnical report on commercial and multi-story projects
02/ 08

Slabs-on-Grade

Slab-on-grade is the most common concrete element in South Florida residential and light commercial construction — the monolithic or separate-pour floor slab that sits on compacted fill and supports everything above it. In Florida, we typically pour monolithic slabs (slab and thickened edge poured together) for single-family homes and light commercial buildings, which is faster, cheaper, and eliminates the cold joint between footing and floor. A proper slab-on-grade in our climate needs five things working together: compacted engineered fill (usually 95% modified Proctor), a 6 to 10 mil polyethylene vapor barrier, termite pre-treatment, 6x6 W1.4xW1.4 welded wire mesh or fiber reinforcement, and 3,000 to 4,000 PSI concrete at a minimum 4 inches thick for residential, 5 to 8 inches for commercial warehouse. Control joints are saw-cut at 24 to 36 times the slab thickness — typically 10 to 12 feet on center for a 4-inch residential slab — within 6 to 12 hours of the pour to manage shrinkage cracking. We pour slabs for new-construction homes in Pembroke Pines and Coral Springs, warehouse floors in Davie and Miramar, retail and restaurant tenant improvements in Fort Lauderdale and Aventura, and renovation slab replacements in older Hollywood and Wilton Manors bungalows where the original 1950s slab has failed. Flatness matters more than most owners realize — we target FF (flatness) numbers of 25 to 35 for residential and 35 to 50 for commercial per ASTM E1155, because out-of-level floors mean flooring failures, door swings that bind, and tile that lippage-cracks within the first year.

Common Applications

  • Monolithic slab-on-grade for new residential construction
  • Warehouse and light industrial floor slabs with heavy wheel loads
  • Retail and restaurant tenant improvement slab replacements
  • Garage and shop slabs with vehicle loading
  • Interior slab additions for lanai enclosures and screen-room conversions
  • Slab replacements for structural moisture or settlement failure
  • Equipment pad slabs for HVAC, generators and compressors
  • Thickened slab edges at doorways and heavy interior partitions

Technical Specs & Details

  • 4 inches minimum for residential; 5 to 8 inches for commercial wheel-loaded slabs
  • 3,000 PSI residential standard; 4,000 to 5,000 PSI for commercial and industrial
  • 6 to 10 mil polyethylene vapor barrier beneath slab, lapped and taped at seams
  • 6x6 W1.4xW1.4 welded wire mesh or macro-synthetic fiber reinforcement
  • Saw-cut control joints at 24–36x slab thickness, cut within 6–12 hours of pour
  • Flatness/levelness targets per ASTM E1155 (FF 25-35 residential, 35-50 commercial)
  • Termite pretreatment applied before vapor barrier per FBC Section R318
  • Curing compound or wet-cure for minimum 7 days to control shrinkage cracking
03/ 08

Elevated Slabs (Post-Tension & Cast-in-Place)

Elevated slabs — any slab that does not bear directly on the ground — are the backbone of mid-rise and multi-story construction throughout South Florida. From five-story condos in Fort Lauderdale to mixed-use developments in Doral and office buildings in Boca Raton, elevated slabs carry gravity loads, serve as diaphragms that transfer lateral loads to shear walls, and provide the finished floor and ceiling surfaces for the levels above and below. Two systems dominate: conventional cast-in-place (CIP) reinforced concrete, and post-tensioned (PT) concrete. CIP elevated slabs are the traditional choice — shored and formed from below, reinforced with top and bottom mats of Grade 60 rebar, poured at 5,000 PSI or higher, and left in shoring for 7 to 14 days before reshoring. Post-tensioned slabs use high-strength seven-wire steel strand (270 ksi) draped in a parabolic profile, stressed to 33,000 pounds per strand after the concrete reaches 75% design strength, then grouted or greased depending on whether the system is bonded or unbonded. PT slabs are thinner, use less concrete, span longer, and deflect less — which is why they are the default on most South Florida mid-rise projects built after 2000. We install elevated slabs for multifamily, condominium, hotel, office, and parking structure projects across Miami-Dade, Broward and Palm Beach counties. Our crews are experienced with both shored-and-reshored CIP sequencing and with post-tension stressing operations, including the required 30-day and 60-day stressing records, calibrated ram certifications, and coordination with the post-tension engineer. Every pour is documented with concrete cylinder breaks at 7, 14 and 28 days and submitted to the structural engineer of record for record.

Common Applications

  • Post-tensioned podium decks for mixed-use mid-rise projects
  • Elevated parking structure slabs with vehicle and snow loads
  • Condominium and hotel floor slabs in oceanfront developments
  • Office building floor plates with long clear spans
  • Mezzanine and loft additions in warehouse adaptive reuse
  • Roof decks that serve as amenity terraces in multifamily projects
  • Balcony and walkway decks with corrosion-protected reinforcement
  • Transfer slabs over ground-floor retail in vertical mixed-use

Technical Specs & Details

  • 5,000 to 6,000 PSI concrete typical; higher strength on transfer slabs
  • Post-tension strand: 1/2 inch, 270 ksi, stressed to 0.80 fpu after 75% f'c
  • Cast-in-place: Grade 60 top and bottom mats, stirrups at column capitals
  • Shoring and reshoring per ACI 347 for 28-day design strength attainment
  • Deflection limits L/480 for occupied spaces, L/240 for roofs
  • Cylinder breaks at 7, 14 and 28 days; lift tickets retained for record
  • Post-tension stressing records signed and sealed by PT engineer
  • Corrosion protection (epoxy-coated or galvanized bar) in balcony and splash-zone locations
04/ 08

Concrete Columns

Concrete columns transfer vertical loads from elevated slabs, beams and roof structures down to the foundation. In South Florida's hurricane zone, they also serve as part of the lateral force-resisting system on buildings that rely on moment frames or column-slab systems rather than dedicated shear walls. Getting columns right is a combination of precise forming, accurate rebar placement, and careful pouring — because a column with a void at the bar intersection is a column with compromised load capacity. We form concrete columns in square, rectangular and round configurations using plywood, aluminum modular forms, or single-use fiber tube (Sonotube) for round columns up to 48 inches in diameter. Reinforcement is Grade 60 longitudinal bar with closed ties or spirals depending on the seismic and lateral detailing requirements — and yes, ACI 318 seismic detailing matters even in Florida because hurricane wind loading produces the same cyclic reversal demands that seismic does. For commercial projects in Miami-Dade and Broward, we see #6 to #11 vertical bars tied with #4 hoops at 4 to 6 inches on center in the column confinement zones. Column pours on a mid-rise project are always a coordination exercise. We pour in lifts, consolidate with internal vibrators on every 18 inches of placement, and either match the slab pour below or cold-joint cleanly with a bonding agent and proper reinforcement dowels. On architectural exposed columns — increasingly common in lofted retail and hospitality work in Fort Lauderdale and Miami — we use premium forming, strict release-agent discipline, and vibration technique to deliver a form-finished surface that needs no coating or cladding.

Common Applications

  • Interior gravity columns on mid-rise multifamily and office projects
  • Perimeter columns integrated with CMU infill walls
  • Architectural exposed columns in retail, hospitality and adaptive reuse
  • Column retrofits and jacketing on older structures in Miami Beach and Coral Gables
  • Round Sonotube columns for carport, porte-cochere and pergola structures
  • Transfer columns supporting long-span podium decks
  • Basement and garage-level columns in below-grade parking
  • Commercial canopy and awning support columns

Technical Specs & Details

  • 4,000 to 6,000 PSI concrete, selected by structural engineer based on column load
  • Grade 60 longitudinal reinforcement with closed ties or spiral confinement
  • Tie spacing tightened to 4–6 inches on center in plastic hinge / confinement zones
  • Minimum clear cover: 1.5 inches interior, 2 inches exterior exposure
  • Form release agent applied consistently to prevent blemishes and rock pockets
  • Concrete placed in lifts with internal vibration on each lift
  • Cold joints roughened and bonded when pour is interrupted
  • Architectural columns forms inspected for dimensional accuracy before pour
05/ 08

Concrete Beams

Concrete beams carry slab and roof loads across openings, between columns, and over long spans where a slab alone cannot carry the demand. In South Florida commercial construction, cast-in-place concrete beams are common in post-tensioned podium decks, at transfer conditions above ground-floor retail, at parking-structure ramp transitions, and as tie beams and bond beams in CMU construction throughout residential and light commercial work. The bond beam is one of the most important pieces of any South Florida block building. A continuous reinforced concrete bond beam runs around the top of every CMU wall — typically 8x8 or 8x16 — tied with Grade 60 rebar and poured with 3,000 to 4,000 PSI concrete. That beam ties the top of the wall together, distributes wind and gravity loads, and provides the anchor for roof trusses and tie-downs. Without a properly detailed and poured bond beam, a block building in a hurricane zone is not structurally complete, and the inspector will not release it for framing. We also install tie beams at intermediate levels in taller block walls, lintel beams above openings, and cast-in-place grade beams that span between pile caps or spread footings on sites with poor soil. Beam reinforcement is typically top and bottom bar with stirrups — the stirrup spacing tightens at the ends near supports where shear demand peaks, and loosens toward midspan where bending demand governs. Every beam pour is inspected for bar placement, concrete cover and stirrup hook detailing before it is released for concrete.

Common Applications

  • Bond beams at the top of CMU walls in residential and light commercial
  • Tie beams at intermediate levels in multi-story block construction
  • Lintel beams above door, window and garage door openings
  • Cast-in-place grade beams spanning between pile caps
  • Transfer beams above ground-floor retail in mixed-use podium construction
  • Parking structure ramp beams at transition between levels
  • Roof framing beams in cast-in-place flat-roof commercial buildings
  • Architectural exposed beams in retail, restaurant and hospitality interiors

Technical Specs & Details

  • 3,000 to 5,000 PSI concrete depending on span and load
  • Grade 60 top and bottom flexural reinforcement, sized by engineer
  • Closed-hoop stirrups or U-stirrups for shear, spacing per structural drawings
  • Stirrup hooks detailed to ACI 318 (135-degree seismic hooks where required)
  • Minimum bar cover: 1.5 to 2 inches depending on exposure
  • Continuous reinforcement through column joints with proper lap splices
  • Inspection required prior to pour (pre-pour checklist signed and approved)
  • Beam forms adequately shored; deflection camber added on long spans per engineer
06/ 08

Shear Walls

Shear walls are the primary lateral force-resisting elements in most South Florida commercial buildings. When a hurricane pushes against the windward face of a five-story condo in Sunny Isles or a ten-story office in Downtown Fort Lauderdale, the horizontal wind pressure on that building has to travel somewhere — typically into diaphragm slabs, then into shear walls, and finally down into the foundation. A building without properly engineered and installed shear walls is a building waiting for a failure mode in the next Category 3 storm. Cast-in-place concrete shear walls are continuous wall elements — typically 8 to 16 inches thick — reinforced with two mats of Grade 60 rebar, one on each face, and tied together with cross-ties. Boundary elements at the ends of the wall concentrate reinforcement and confinement ties to handle the high tension and compression demands at the extreme fibers of the wall. Coupling beams — short, deep beams connecting adjacent wall segments over openings — often require diagonal reinforcement in high-demand locations. We pour shear walls at 5,000 PSI or higher, typically in lifts of 6 to 10 feet, with internal vibration throughout the lift to eliminate voids and honeycombing. Our crews work shear walls into the overall building sequencing on multi-story projects across the tri-county region. Wall forms are typically aluminum modular systems that allow repeat use over each floor, and we coordinate pour timing with column and slab operations so that the vertical load path is continuous and uninterrupted. Post-installation, we cylinder-test every pour and document the results for the structural engineer of record.

Common Applications

  • Primary lateral force-resisting walls in mid-rise multifamily and office
  • Elevator and stair core walls that serve as shear cores
  • Basement and below-grade retaining / shear wall combinations
  • Perimeter shear walls at the ends of long rectangular buildings
  • Coupled shear wall systems over corridor and door openings
  • Shear wall retrofits on older buildings upgraded for current FBC wind loads
  • Partial-height shear wall segments tied into transfer girders
  • Tilt-up shear walls on light industrial and warehouse projects

Technical Specs & Details

  • 5,000 PSI minimum concrete, often 6,000 PSI on high-demand walls
  • Two curtains of Grade 60 rebar, horizontal and vertical, per face
  • Boundary element reinforcement with closely-spaced confinement ties
  • Cross-ties between curtains at 12–24 inches on center per structural drawings
  • Coupling beams with diagonal reinforcement in high-shear-demand conditions
  • Wall thickness typically 8–16 inches depending on building height and demand
  • Aluminum modular wall forms for dimensional accuracy and repeat use
  • Pour in lifts with internal vibration; cold joints bonded and doweled
07/ 08

Concrete Shell

Concrete shell — the complete structural envelope of a building, from foundation through roof deck — is the scope we take on when a general contractor wants a single subcontractor accountable for every piece of structural concrete on the project. It is the most demanding form of concrete contracting because shell work touches every other trade, sets the schedule for the entire job, and bears full responsibility for dimensional accuracy throughout the building. A typical South Florida mid-rise shell package includes foundation footings, stem walls, ground-floor slab, columns at each level, elevated slabs (often post-tensioned), shear walls, stair walls, elevator core walls, balcony slabs, parapet walls and roof deck. On a five- to ten-story project in Downtown Miami or Brickell, that scope might run 60,000 to 250,000 square feet of formed and poured concrete, delivered over 6 to 14 months of construction. Every pour has to be scheduled around the ready-mix supplier, the pump contractor, the inspection schedule, the crane operator, and the follow-on trades that need access to the deck above. We deliver shell packages for multifamily, condominium, hotel, office and mixed-use projects across Broward, Miami-Dade and Palm Beach. On every shell job, we assign a dedicated concrete superintendent, maintain a daily pour log, cylinder-test every mix, and coordinate inspections with the Authority Having Jurisdiction. Shell-stage concrete is the single biggest predictor of whether a project delivers on schedule — and our job is to make sure the answer is yes.

Common Applications

  • Full concrete shell packages for mid-rise residential condominiums
  • Hotel and hospitality shell construction in oceanfront locations
  • Office building shells with post-tensioned floor plates
  • Mixed-use podium-over-retail shell packages
  • Parking garage shell construction with ramps and transfer slabs
  • Healthcare facility shells with specialty floor flatness requirements
  • Educational facility shells with long-span classroom and gymnasium structures
  • Industrial and warehouse shells with heavy-duty floor slabs

Technical Specs & Details

  • Single-source responsibility for all structural concrete on the project
  • Dedicated project superintendent on-site for entire shell duration
  • Daily pour logs, cylinder tests and inspection documentation maintained
  • Coordination with structural engineer of record on mix designs and sequencing
  • Ready-mix supplier relationships for pump-grade delivery on urban sites
  • Typical durations: 4–8 months residential mid-rise, 10–18 months commercial
  • Coordination with follow-on trades (MEP, curtainwall, framing) for deck access
  • Quality control documentation turned over at project closeout
08/ 08

Masonry (CMU)

Concrete masonry — specifically 8-inch and 12-inch CMU (concrete masonry unit) block construction — is the dominant wall system for single-story and light multi-story construction across South Florida. Termite resistance, wind-load performance, fire rating, and cost all favor block over wood framing in our climate, and the Florida Building Code reflects that preference in how wind-load and envelope requirements are structured. A properly built CMU wall is more than a stack of block — it is a reinforced concrete wall that happens to use block as the form. We install vertical reinforcement in cells at 16, 32 or 48 inches on center depending on the wind load and building height, grout those cells with 3,000 PSI fine-grout coarse-grout mix, and tie everything together with horizontal bond beams at the top of the wall and at intermediate levels in taller walls. Joint reinforcement (ladder or truss wire) runs in the mortar joints at 16 inches on center for serviceability crack control. We lay CMU walls for new residential construction throughout the tri-county region, for light commercial and retail, for warehouse and industrial partition walls, and for renovation work where existing block walls need to be extended, reinforced or opened for new structural conditions. Every block wall gets a dedicated cell layout diagram that shows exactly which cells receive vertical reinforcement and grout — because missed grouted cells are one of the most common causes of wall failure on block buildings during hurricane events.

Common Applications

  • Exterior load-bearing walls for single-family and multifamily residential
  • Fire-rated demising walls between units in townhome and duplex construction
  • Commercial and retail perimeter walls
  • Interior structural and non-structural partitions in commercial buildings
  • Warehouse and light industrial wall systems
  • Property-line and privacy walls in residential developments
  • Pool enclosure walls and screen-room foundations
  • Garden and retaining walls on sloped residential lots

Technical Specs & Details

  • 8-inch CMU standard; 12-inch for tall walls or high-demand lateral conditions
  • Grade 60 vertical reinforcement at 16–48 inches on center per engineer
  • 3,000 PSI fine or coarse grout in all reinforced cells
  • Bond beam at top of wall, typical 8x8 or 8x16 section
  • Joint reinforcement at 16 inches on center in mortar joints
  • Type S or Type M mortar per ASTM C270
  • Termite-treated sill plates and cell grouting per FBC Section R318
  • Cell grouting inspected prior to pour; open-cell inspection mandatory
Why It Matters

Why Structural Concrete Matters in Florida

Structural concrete is where the stakes are highest in South Florida construction. The building department is rigorous, the engineering is complex, and the consequences of a mistake are measured in lives, not dollars. Florida Building Code 2023 sets the minimum performance standard, but minimum compliance is not a design philosophy — it is a floor, not a target. Consider the design environment. Wind speeds on the coast routinely exceed 170 mph in ASCE 7-22 calculations. The water table in much of Broward and Miami-Dade sits within a few feet of the surface, which means foundations and below-grade elements have to account for hydrostatic pressure and potential buoyancy during tropical storm flood events. Salt-laden air drives chloride ingress into reinforcement at rates that would shock a contractor from Ohio or Texas, which is why epoxy-coated rebar, increased cover, and silica-fume mix additives are standard on coastal balconies, parking decks and any element exposed to spray from the Atlantic or the Intracoastal. Expansive marl clay shows up in pockets across Davie, Pembroke Pines and western Broward — driving the need for deeper footings or structural fill replacement on some sites. Then there is the High-Velocity Hurricane Zone. Miami-Dade and Broward are designated HVHZ under the FBC, which triggers an additional product approval regime: every component that is part of the building envelope or structural system — from hurricane ties to rebar splice couplers to post-tension anchorages — has to carry a Miami-Dade Notice of Acceptance (NOA) or Florida Product Approval. The building department audits those NOA numbers at plan review and at field inspection. We maintain an internal NOA binder for every active job so nothing gets installed without documented approval. All of which means structural concrete work in this region is not interchangeable with structural concrete work anywhere else. Mix designs are different (more cement, more supplementary cementitious material, tighter w/c ratios). Reinforcement specifications are different (higher cover, corrosion-resistant coatings in exposure zones). Detailing is different (seismic-style confinement even for wind-only conditions, because hurricane wind cycling imposes similar demands). Pour sequencing is different (shorter cold-joint tolerance because our curing conditions accelerate early strength gain). Inspection is different (more frequent, more rigorous, with higher documentation standards). None of this is exotic — it is the baseline of competent structural concrete construction in South Florida. What distinguishes a strong structural contractor from a mediocre one is whether the baseline is actually being executed, documented and inspected on every pour. Nest Concrete's structural work is built around that standard, and it is why general contractors and owner-builders across the tri-county region rely on us for the scope that matters most.

Our Process

How We Deliver

01

Pre-Construction Review

We review sealed structural drawings with the engineer of record, confirm mix designs, identify NOA-approved products, and develop a pour schedule coordinated with the GC. Any constructability concerns get raised and resolved before we mobilize.

02

Site Prep & Layout

Excavation, compaction verification (95% modified Proctor typical), layout to sealed drawings, and sub-base preparation including vapor barrier and termite treatment coordination. Layout is verified against plan before forming begins.

03

Forming & Reinforcement

Form systems selected for accuracy and reuse economy. Rebar fabricated, placed and tied to structural drawings with proper cover, lap splices and hook detailing. Pre-pour inspection with engineer and AHJ.

04

Placement & Consolidation

Ready-mix delivered per ASTM C94. Slump and cylinder samples taken at the truck. Concrete placed in lifts, internally vibrated, screeded to design elevation. Cold joints planned in advance and bonded where unavoidable.

05

Curing & Testing

Curing compound, wet-cure mats or ponding applied per specification. Cylinders broken at 7, 14 and 28 days. Strength results submitted to structural engineer. Forms stripped only after design strength reached.

06

Inspection & Handoff

Final structural inspection with AHJ. Documentation package — pour logs, cylinder results, mix tickets, inspection sign-offs — delivered to GC for permit closeout. Structural scope formally released to follow-on trades.

Pricing

Structural Concrete Cost Guide

Typical project range: $20–$45 per sq ft installed for structural scope (excluding sitework)

Concrete Strength Class

A jump from 3,000 PSI residential mix to 5,000–6,000 PSI structural mix runs $15–$35 per cubic yard of material. On a 300-yard project, that alone can shift the number by $10,000.

Reinforcement Grade & Coverage

Grade 60 rebar is standard; epoxy-coated or stainless in coastal splash zones adds 30–60% to steel cost. Heavier reinforcement schedules on shear walls and transfer beams can double the per-square-foot steel weight.

Post-Tension vs Conventional

PT elevated slabs use about 35% less concrete and 60% less mild reinforcement but add the cost of strand, anchors, stressing and grouting. Net cost is usually 5–15% lower than CIP on slabs 8 inches or thicker.

Forming Complexity

Flat slab and typical wall forms are efficient. Architectural exposed columns, coffered ceilings, curved walls and complex geometry can double forming cost per square foot due to custom fabrication and single-use forms.

Access & Pumping

Tight urban sites in Downtown Fort Lauderdale or Brickell often require boom-pump rental at $1,500–$3,500 per day and specialized traffic control, adding 8–15% to placement cost versus an open-site pour.

Geotechnical Conditions

Sites with poor soil, high water table or expansive clay require deeper footings, over-excavation and structural fill, or pile foundations — which can add $5–$20 per square foot of footprint before structural concrete even begins.

NOA & Product Approval

HVHZ projects in Miami-Dade and Broward require NOA-approved splice couplers, PT anchorages and reinforcement. Premium-priced approved products run 10–30% above generic alternatives.

Schedule Compression

Overtime and Saturday pours on aggressive schedules add 25–50% labor premium. Night pours to beat summer heat on flatwork add pump, lighting and crew premiums but improve concrete quality in July-August.

FAQ

Frequently Asked Questions

Everything you need to know about structural concrete in South Florida.

What is the difference between a monolithic slab and a stem-wall foundation in South Florida?

A monolithic slab pours the footing and floor slab in a single operation, which is faster and more economical — common on residential tract construction in Pembroke Pines, Coral Springs and Miramar. A stem-wall foundation pours a separate footing and then builds a short block or cast-in-place wall on top before the interior floor slab is placed. Stem-wall systems are required or preferred on any site where the finished floor must be raised above base flood elevation, which is most of coastal Broward, Miami-Dade and Palm Beach. The stem wall gives you several inches to several feet of elevation above grade, protects the slab edge from moisture, and provides a clean tie-in point for exterior cladding.

Do I need rebar or is wire mesh enough for my residential slab?

It depends on the engineer's specification and the slab's role. For a simple interior floor slab with no structural demand beyond supporting its own dead load and a normal residential live load, 6x6 W1.4xW1.4 welded wire mesh or macro-synthetic fiber reinforcement is often sufficient and is what most plans specify. For any slab that carries vehicle loads, is exposed to weather, spans soft fill, or is part of a monolithic slab-and-footing system, Grade 60 rebar is typically required — usually #4 or #5 bars on a 12 to 16 inch grid. Our recommendation is always to follow the sealed structural drawing. If you do not have one, we will not pour. It is not worth the risk on a Florida slab.

What is the Miami-Dade NOA and why does it matter on my project?

NOA stands for Notice of Acceptance, and it is Miami-Dade County's product approval system for any component of the building envelope or structural system. Miami-Dade and Broward Counties are designated as the High-Velocity Hurricane Zone (HVHZ) under the Florida Building Code, and HVHZ projects require NOA-approved products for items that would carry a generic specification elsewhere — hurricane clips, rebar splice couplers, post-tension anchorages, concrete repair materials, and more. The building department verifies NOA numbers at plan review and field inspection. If an unapproved product is installed, the work has to be torn out. We maintain an internal NOA binder for every HVHZ job so this is never an issue.

How long does concrete take to cure and when can I put a load on it?

Concrete reaches approximately 50% of its design strength in 3 days, 70% in 7 days, and 95–100% in 28 days under normal Florida conditions. For a 3,000 PSI residential slab, that means foot traffic is typically safe after 24–48 hours, light furniture at 7 days, and vehicle traffic at 14 to 28 days depending on the load. Structural elements like elevated slabs, beams and columns should not carry design loads until 28-day strength is verified by cylinder break, which is why shoring on elevated decks is left in place for at least two weeks and reshoring is used for another 10 to 14 days. Our proposals include a specific load schedule for each element.

What does bond beam installation cost and why is it required?

Bond beams are the continuous reinforced concrete beams that run around the top of every CMU block wall in Florida residential and light commercial construction. Materials run roughly $18 to $35 per linear foot including rebar, block, grout and labor depending on the beam section and the wall height. They are required by the Florida Building Code because they tie the top of the wall together, distribute roof truss and wind loads, and provide the anchor for hurricane-rated truss tie-downs. Without a properly poured bond beam, a block building cannot be released for framing because the lateral load path from roof to wall is not complete.

Can you install structural concrete on a site with a high water table?

Yes, and we do it regularly across coastal Broward and Miami-Dade — some sites in Wilton Manors, Fort Lauderdale and Hollywood have groundwater within 2 feet of grade. The solutions depend on the depth of the structure. For shallow footings, we dewater the excavation with well-points or trash pumps during the pour, place compacted stone or structural fill as a working platform, and specify a mix with accelerator additives so the concrete sets before water intrusion can compromise the pour. For deep below-grade elements like elevator pits or basements, waterproofing becomes a primary design issue and involves bentonite panels, crystalline admixtures, or blindside membrane systems coordinated with the structural engineer.

What is the difference between cast-in-place and precast concrete for my project?

Cast-in-place concrete is poured on site into forms that are built in place — the traditional method and still the dominant approach for most structural work in South Florida. Precast concrete is poured in a controlled plant, cured to design strength, and delivered to the site for erection by crane. Precast is faster in the field, offers better quality control on the finish, and is often the right choice for repetitive elements like parking garage double-tees, tilt-up panels or architectural facade panels. Cast-in-place is more flexible for complex geometry, custom details and renovation work where precast lead times do not fit the schedule. Most of our projects use cast-in-place for the primary structure and precast selectively for elements where it makes sense.

Do you provide engineering and permit drawings or do I need a separate engineer?

We are a concrete contractor, not a licensed engineering firm, so we do not produce sealed structural drawings. Any structural concrete project in Florida requires drawings signed and sealed by a Florida-licensed structural engineer — that is a state law, not a preference. We work from the engineer's drawings, and we regularly collaborate with a network of local structural engineers on owner-direct projects where the owner needs a full design-build delivery. If you are starting from scratch and need an engineer, we can make a referral based on your project type, and we will coordinate directly with the engineer from pre-construction through final inspection.

How do you handle an inspection failure or building department correction?

Inspection failures happen occasionally on any active concrete project — a rebar size is wrong, a cover distance is short, a tie spacing is off. When it happens, we stop work immediately, document the specific correction the inspector flagged, make the correction, and schedule a re-inspection before we resume. Our pre-pour checklist catches most issues before inspection, but the building department has the final word. What we never do is pour over a failed inspection or cover up a correction. That approach saves a day on the front end and costs a month and a lawsuit on the back end. Transparency with the AHJ is how we keep our license and our reputation intact.
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