Lumber Mill Construction and Design Guide – Technical Specifications

Processing Areas

Primary Breakdown Zone

Area	Size (m²)	Equipment	Power (kW)
Log Deck	500-800	Log Turner	30-40
Debarker	100-150	Drum/Ring	75-100
Head Saw	200-300	Band/Circular	150-200
Carriage	150-200	Automated	50-75
Cant Line	200-250	Multiple Saws	100-125

Equipment Specifications

Sawing Equipment

Machine	Capacity	Blade Size	Feed Rate
Head Saw	80-100 cm dia.	1.8-2.4m band	20-30 m/min
Resaw	60-80 cm dia.	1.5-1.8m band	30-40 m/min
Edger	40-50 cm dia.	Multiple blades	40-50 m/min
Trimmer	30-40 cm dia.	Circular	50-60 m/min
Gang Saw	Multiple	Frame saws	15-20 m/min

Material Handling

Conveyor Systems

Type	Width (m)	Speed (m/min)	Load (kg/m)
Log Infeed	1.2-1.5	15-20	500-750
Green Chain	0.8-1.0	20-25	200-300
Waste Conveyor	0.6-0.8	30-35	150-200
Sorting Table	1.0-1.2	25-30	250-350
Stacker Feed	1.2-1.5	20-25	300-400

Storage Requirements

Log Yard

Area	Capacity	Surface	Equipment
Log Storage	3-6 months	Gravel/Concrete	Front loader
Sorting Yard	1-2 weeks	Concrete	Mobile crane
Debarking Queue	2-3 days	Concrete	Chain conveyor
Waste Storage	1-2 weeks	Concrete	Truck access

Drying Facilities

Kiln Specifications

Type	Capacity (m³)	Temperature (°C)	Duration
Package Kiln	50-100	60-80	3-7 days
Progressive	150-200	60-80	4-8 days
Vacuum Kiln	20-30	40-60	2-4 days
Pre-dryer	200-300	Ambient	2-4 weeks

Power Requirements

Electrical Systems

Area	Load (kW)	Backup	Power Factor
Primary Break	300-400	Optional	0.85
Secondary Break	200-250	Optional	0.85
Material Handling	150-200	Essential	0.80
Kilns	100-150	Essential	0.90
Dust Collection	75-100	Essential	0.85

Dust Collection

Extraction Systems

Component	Capacity (m³/hr)	Pressure (Pa)	Filter Type
Main System	50,000-75,000	2500-3000	Bag house
Saw Hoods	5,000-7,500	2000-2500	Cyclone
Trimmer System	10,000-15,000	2000-2500	Cyclone
Chipper	20,000-25,000	2500-3000	Cyclone

Construction Costs (USD)

Facility Components

Element	Cost Range	Life Cycle	Maintenance/Year
Building Shell	1.5-2.0M	30-40 years	2-3%
Primary Equipment	2.0-3.0M	15-20 years	5-7%
Material Handling	1.0-1.5M	10-15 years	4-6%
Kilns	800K-1.2M	20-25 years	3-5%
Infrastructure	500-750K	25-30 years	2-4%

Maintenance Requirements

Equipment Service

Component	Frequency	Duration	Type
Saw Blades	Daily	1-2 hours	Sharpen
Bearings	Weekly	2-3 hours	Lubricate
Conveyors	Monthly	4-6 hours	Inspect/Repair
Kilns	Quarterly	8-12 hours	Service
Dust System	Monthly	4-6 hours	Clean/Check