The BHS Animal & Plant Science Remodel is a single-story interior renovation project at an existing school facility in Bentonville, Arkansas, involving demolition and selective removal of architectural, mechanical, electrical, plumbing, and limited exterior components to accommodate the new renovation work.

The Site Preparation & Demolition scope includes all work necessary to safely prepare the project site, remove designated existing materials, protect adjacent occupied areas, and dispose of debris generated from interior demolition and selective exterior removals.

The relevant drawings for demolition scope include:

• A0.1 – General Notes / Project Information
• A2.0 – Demolition Plan and Demolition Notes
• A2.1 – Floor Plan
• M2.0 – HVAC Demolition Plan
• E2.0 – Electrical Demolition Plan
• P2.0 – Plumbing Demolition Plan
• S3.1 – Structural Coordination Notes

The demolition scope includes:

1. Interior wall demolition
2. Ceiling removal
3. Floor finish demolition
4. Selective concrete demolition
5. Mechanical/electrical/plumbing demolition coordination
6. Exterior selective demolition
7. Debris hauling and disposal
8. Protection and temporary barriers

This trade is highly labor-sensitive because the project is a selective remodel in an existing occupied educational facility, requiring careful demolition sequencing and protection of adjacent finishes.

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2. TRADE ABSTRACT / SCOPE OVERVIEW

The demolition subcontractor scope includes:

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A. Site Preparation

• Mobilization
• Dust barriers
• Temporary protection
• Floor protection
• Debris staging
• Safety barricades

Referenced in:

• A0.1 General Notes
• A2.0 Demo Notes

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B. Interior Demolition

• Remove existing partitions
• Remove doors/frames as indicated
• Remove ceilings in renovation areas
• Remove floor finishes
• Remove casework
• Remove plumbing fixtures
• Remove MEP devices in demolition zones

Referenced in:

• A2.0 Demolition Notes
• M2.0
• E2.0
• P2.0

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C. Exterior Selective Demolition

• Remove sidewalk at new exterior openings
• Remove masonry for new louver openings
• Remove slab at plumbing locations

Referenced in:

• A2.1
• S3.1

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D. Hauling & Disposal

• Dumpster service
• Debris loading
• Disposal fees
• Final cleanup

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E. Labor & Equipment

• Labor crews
• Demo saws
• Jackhammers
• Dump trailers
• Debris carts

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3. PLAN REVIEW PROCESS

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Step 1 – Review Architectural Demolition Plan (A2.0)

The estimator begins with A2.0, where demolition notes define:

• Walls to be removed
• Ceilings to be demolished
• Slab openings
• Door/frame removals
• Equipment removals

This is the main demolition quantity source.

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Step 2 – Review MEP Demo Sheets

Then review:

• M2.0 HVAC Demo
• E2.0 Electrical Demo
• P2.0 Plumbing Demo

These identify:

• Existing duct removals
• Fixture removals
• Piping removals
• Device removals

These define coordinated demolition labor.

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Step 3 – Review Structural Notes

Structural sheet S3.1 indicates slab demo and pour-back locations.

This identifies heavier demolition scope requiring sawcutting.

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Step 4 – Review Architectural Floor Plan

A2.1 provides:

• New opening locations
• Exterior modifications
• Wall changes

These indicate selective exterior demolition quantities.

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4. ESTIMATION PREPARATION STEPS

Before takeoff, the estimator sets assumptions:

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Assumptions

• Interior demolition limited to renovation areas
• Adjacent occupied areas remain active
• Contractor responsible for debris disposal
• Hazardous material abatement excluded
• One mobilization assumed

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Waste / Disposal Assumptions

• Demo debris loose load factor: 1.35
• Dumpster haul allowance: 20 CY
• Disposal included at local rates

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Labor Assumptions

Prevailing wage demolition productivity:

• Wall demolition: 25 SF/hr
• Ceiling removal: 80 SF/hr
• Floor demo: 60 SF/hr
• Loading/cleanup: 6 CY/hr

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Constructability Considerations

Selective demolition is slower because:

• Existing conditions vary
• Protection measures reduce productivity
• Occupied building logistics slow removal
• MEP coordination adds labor

These factors heavily influence labor cost.

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5. DETAILED MATERIAL TAKEOFF

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A. Interior Partition Demolition

Assume renovation area includes:

• 220 LF of partitions
• 10′ wall height

220 × 10 = 2,200 SF

Wall demolition productivity includes studs, drywall, and cleanup.

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B. Ceiling Removal

Assume renovation area:

• 1,800 SF ACT ceiling removal

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C. Floor Finish Removal

Assume:

• 1,800 SF flooring removal

Includes VCT/carpet demolition and scraping.

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D. Doors / Frames Removal

Assume:

• 6 door/frame assemblies

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E. Concrete Demolition

From slab patch areas:

• 120 SF slab demo
• 8 SF sidewalk removal
• 40 SF masonry opening removal

Total:
168 SF selective concrete/masonry demolition

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F. Dumpster / Disposal

Loose debris estimate:

Walls:

2,200 SF × 0.15 CY = 330 CY

Ceiling:

1,800 SF × 0.03 CY = 54 CY

Flooring:

1,800 SF × 0.02 CY = 36 CY

Total loose debris:
420 CY

Compacted / hauled:
420 ÷ 20 = 21 dumpsters

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6. LABOR & PRICING BUILD-UP (Prevailing Wage)

Using Arkansas prevailing demolition wage assumptions:

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Labor Pricing

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Partition Demolition:

2,200 ÷ 25 = 88 hrs
88 × $58 = $5,104

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Ceiling Removal:

1,800 ÷ 80 = 22.5 hrs
22.5 × $58 = $1,305

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Floor Demo:

1,800 ÷ 60 = 30 hrs
30 × $58 = $1,740

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Doors/Frames:

6 × 2 hrs = 12 hrs
12 × $58 = $696

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Concrete/Masonry Demo:

168 ÷ 15 = 11 hrs
11 × $58 = $638

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Cleanup / Hauling:

21 × 2 hrs = 42 hrs
42 × $58 = $2,436

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Labor Total:

$11,919

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Equipment / Disposal

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Dumpsters:

21 × $550 = $11,550

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Demo tools / saws / carts:

Allowance = $950

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Equipment Total:

$12,500

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Materials / Protection

Dust barriers, poly, temporary protection:
$1,250

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Direct Cost

$11,919 + $12,500 + $1,250 = $25,669

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O&P

Overhead 10%

$2,567

Profit 10%

$2,824

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Tax

Minimal taxable materials:
$100

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Final Demo Estimate:

$31,160

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7. FINAL ESTIMATE SUMMARY

Cost Item	Amount
Materials / Protection	$1,250
Labor	$11,919
Equipment / Disposal	$12,500
Tax	$100
O&P	$5,391
Final Estimate Total	$31,160

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8. ESTIMATOR NOTES / PROFESSIONAL INSIGHTS

The demolition scope is labor-intensive and disposal-heavy, with dumpster hauling being one of the largest cost drivers.

Major pricing drivers:

1. Occupied school environment
2. Protection requirements
3. Debris handling logistics
4. Selective demolition coordination
5. Concrete sawcut and patch locations

In selective remodel projects, demolition labor costs are often underestimated because the work requires:

• Careful removal around remaining finishes
• Controlled dust containment
• Segregated MEP demolition
• Frequent cleanup cycles

The disposal component alone represents over one-third of the estimate, which is typical for interior renovation demolition.

Recommended bid clarifications:

• Hazardous material abatement excluded
• Off-hours work excluded
• One mobilization included
• Salvage not included
• Structural demolition beyond plans excluded

These assumptions protect the subcontractor from concealed demolition risk.