Calculator Home /Standard Footprints/24x30 Slab & Building Specs
30' LENGTH (2 BAYS) 24' WIDTH 720 SQ FT | 4" SLAB | ~12 YD3
Concrete Volume ~12 YD³
9-Yd Mixer Trucks 2 Trucks
Total Wet Weight 24.3 Tons
24x30 FOOTPRINT | 720 SQ FT | 2-CAR GARAGE & WORKSHOP SPEC

24' x 30' Concrete Slab & Metal Building Specifications (720 Sq Ft)

Engineering volume, weight, bag equivalents, and rebar requirements for a 24' x 30' (720 sq ft) monolithic concrete foundation and metal building footprint.

Footprint Area & Perimeter 720 sq ft (108 LF Perimeter)
Slab Thickness & Grade Beam 4" Deck | 12" x 18" Perimeter Grade Beam (108 LF)
Ready-Mix Volume (+10% Waste) ~12 YD³ (324 FT³)
Pre-Mixed Bag Equivalent 540 x 80-lb (720 x 60-lb)
Deformed Rebar Footage ~960 LF (#3 (3/8") Grade 60 Rebar @ 18" OC on Support Chairs)
DFW DOT Bid Foundation Index $5,210 - $10,980 (Slab Benchmark)
Request Local Quote for 24x30 ↓ Open in Calculator

Engineering Specifications (24x30)

  • 720 sq ft total footprint (24 ft width x 30 ft length)
  • ~12 cubic yards (324 cu ft) of 3,000 PSI ready-mix concrete including 108 LF of 12" x 18" perimeter grade beam and 10% waste allowance
  • 48,600 lbs (24.3 short tons) total wet weight at 150 lbs/cu ft (equivalent to 540 x 80-lb pre-mixed bags)
  • 2 standard 9-yard ready-mix concrete mixer truck loads
  • ~960 linear feet of #3 (3/8") Grade 60 deformed rebar tied on 18" centers + 2 continuous perimeter beam bars
  • 6 structural column anchor locations (24 anchor bolts) across two 15-ft bays

Common Applications & FAQs

  • Two-car detached residential garage with workbench storage
  • Residential hobby workshop, lawn tractor shed, or UTV storage
  • Monolithic foundation pad for a 24x30 pre-engineered metal building kit
How many cubic yards of concrete are in a 24x30 monolithic slab?
A flat 4-inch slab measuring 24x30 (720 sq ft) contains 8.89 cubic yards of concrete in the main floor deck alone. When you add a thickened 12" x 18" perimeter grade beam (108 linear feet) and a standard 8% to 10% subgrade waste allowance, a 24x30 monolithic foundation requires approximately 12 cubic yards (2 mixer truck loads).
How many 80-lb bags of concrete equal a 24x30 slab?
12 cubic yards of concrete equals 324 cubic feet, which is equivalent to 540 bags of 80-lb pre-mixed concrete (or 720 bags of 60-lb concrete). For any slab of this size, batch-plant ready-mix delivery by mixer truck is standard.

Other Standard Building & Slab Sizes

30' x 40' (1,200 sq ft) ~22 YD³ | 3 Trucks | $8,690 - $18,300 30' x 50' (1,500 sq ft) ~31 YD³ | 4 Trucks | $10,860 - $22,875 40' x 60' (2,400 sq ft) ~49 YD³ | 6 Trucks | $17,375 - $36,600 50' x 80' (4,000 sq ft) ~85 YD³ | 10 Trucks | $28,960 - $61,000 60' x 100' (6,000 sq ft) ~135 YD³ | 15 Trucks | $43,440 - $91,500

CONCRETE & BUILDING CALCULATOR

Calculate exact ready-mix cubic yards, 9-yard mixer truck loads, bag counts, weight, and TxDOT foundation cost benchmarks instantly.

DIMENSIONS & SLAB SPEC
FT
FT
FT
PROJECT SCOPE
  • → Includes thickened 12"x24" perimeter grade beams and 8% subgrade waste factor
  • → 3,500 PSI ready-mix within a 90-minute ASTM C94 batch-plant radius
  • → Anchor-bolt layout matched to Mueller, Prime, Brazos, or custom weld-up frames
TECHNICAL RESULT LIVE SPEC
~31 Cu. Yds.
Includes 12"x24" perimeter beam & 8% waste factor • 1,500 SF (14'H)
9-YD MIXER TRUCKS 4 Trucks (62.8T) Batch-plant delivery
BAGS (80LB EQUIV) 1,395 Bags At 150 lbs / cu ft
GRADE BEAM & REBAR 160 LF / 3,640 LF Beam / Deformed Bar
READY-MIX MATERIAL ~$5,208 ~31 Cu. Yds. @ $168/yd
TXDOT / DFW FOUNDATION BENCHMARK 1,500 sq ft @ $7.24 - $15.25/sf Selected Scope: Slab + 6"-18" Select Fill Pad.
$10,860 - $22,875 Median $11.25/sq ft (~$16,875)
LOCK IN THIS SPEC & REQUEST LOCAL QUOTE ↓
View 2D Anchor-Bolt Plan, 3D Slab Cutaway & Kit Options
30' W x 50' L x 14' H (1,500 SQ FT)
ANCHOR BOLT & BEAM PLAN 30' x 50' (8 Anchor Columns) 160 LF Grade Beam + 5' Pad Apron 5" REINFORCED SLAB (3,500 PSI) | 1,500 SQ FT #4 Rebar @ 12" OC | 12" x 24" Grade Beam (160 LF) 6"-18" SELECT FILL PAD + 10-MIL VAPOR BARRIER READY-MIX: ~31 CU. YDS. (4 TRUCKS | 62.8 TONS)
26-GA COLOR: Limestone Tan / Burnished Slate
GET YOUR LOCAL SITE QUOTE & SPEC SHEET Submit your property details below to route this volume takeoff to our local North Texas concrete & building crew.
Selected: 30' x 50' (1,500 SF) | ~31 Cu. Yds.
PREFERRED DELIVERY CHANNELS:

How It Works

From instant concrete yardage takeoff to on-site laser elevation verification in 4 steps.

STEP 01

Calculate Your Slab & Building

Select a standard 24x30 to 60x100 footprint or enter custom dimensions to get exact cubic yards, mixer trucks, and DOT cost benchmarks.

STEP 02

Choose Your Trade Scope

Select Concrete Slab Only, Slab + Select-Fill Pad, Pre-Engineered Kit Erection, or a complete Dirt-to-Finish Turnkey Building.

STEP 03

Batch-Plant & Pad Check

We verify your ZIP code's 90-minute ready-mix haul radius, soil plasticity index, and laser pad slope for an accurate local quote.

STEP 04

Direct Local Crew Dispatch

Your spec sheet routes one-to-one to our designated county concrete and steel erection crew with zero broker spam.

Concrete Foundation & Kit Erection Guides

Field guides covering monolithic grade beams, low-PI select fill pads,
Mueller/Prime/Brazos kit erection, and Texas Chapter 233 county rules.

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What does an engineered monolithic concrete foundation actually cost across Weatherford, Granbury, Stephenville, and Decatur in 2026? Here is the exact line-item breakdown for 3,000 to 4,000 PSI ready-mix, #3 vs #4 deformed rebar grids, 12x24 perimeter grade beams, and compacted select fill pads.

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Mueller Inc., Prime Metal Buildings, Brazos Metal Building Systems, and JAG Metals manufacture outstanding steel building packages across North Texas, but none of them pour concrete slabs or erect the steel. Here is how much erection labor, anchor-bolt coordination, and foundation work cost in 2026.

READ GUIDE → Price My Mueller / Prime Kit Erection + Slab
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Do You Need a Building Permit for a Metal Shop or Barndominium on Unincorporated Land in Parker, Hood, Wise or Erath County? (Texas Chapter 233)

Over 80% of our concrete slab and metal building builds happen on unincorporated 1-to-50 acre tracts outside municipal city limits. Here is what Texas Local Government Code Chapter 233 allows, which county permits STILL apply (septic, floodplain, driveway culverts), and how incorporated city permits work.

READ GUIDE → Price a 40x60 Unincorporated Acreage Shop + Slab