MS Mushroom Growing Rack Design & Height Standards
MS growing rack design for mushroom farms: tier spacing, aisle width, rack height, MS angle and jali quantities, and how layout limits room capacity.
How are mushroom growing racks designed and how tall should they be?
Commercial mushroom racks are MS angle frames with 7 tiers, roughly 400–450 mm of clear vertical space per tier, a bed width of about 1.2 m and aisles of 750–900 mm for picking. Total rack height is capped by the internal room height and by the highest level a picker can harvest without a platform.
Estimate your own numbers
Pick a room size and count — the tool applies the same engineering constants used in MushroomWale BOQs and returns a recommended plan summary.
Total built-up area
~1,440 sq ft
720 sq ft per room
Cooling requirement
~16 TR
8 TR per room
Bag capacity
~3,200 bags
1,600 bags per room
Phase-III compost
~80–96 T
per full filling (25–30 kg/bag)
MS racking material
~4,100 kg angle
+ ~450 kg jali (incl. wastage)
PUF doors
2 nos.
insulated cold-room doors
Yield per cycle
~6,400 kg
~106 kg/day at peak flush
Annual yield @ 5 cycles
~32,000 kg
fresh weight, all flushes
Recommended plan summary
Climate unit per room: Daikin 8 TR (~28 kW Outdoor Unit)
2× Outdoor Unit (4 HP ea., R32 3ph HMT) + 1× Indoor Unit (HMT Dual-Circuit Evap, 550mm fan)
Compost planning: ~80–96 tonnes of Phase-III compost per filling, staggered across rooms so tunnel turns stay continuous.
Indicative engineering estimate only — not a price quotation. Final sizing depends on site conditions, climate zone, ceiling height and grower practice. GST and transportation are extra; any additional client requirement is charged extra.
How MushroomWale calculates it
- 1
Fix tier count from internal height
Work downward from the internal clear height after the ceiling panel and ducting. Each tier needs clear space for the bed plus headroom for casing, watering and pinning airflow. Seven tiers is the MushroomWale standard for our production rooms.
- 2
Set bed width for two-side access
Beds around 1.2 m wide can be worked from both sides. Wider beds leave an unreachable centre strip where mushrooms over-mature and become a disease reservoir.
- 3
Leave real aisles
750–900 mm aisles. Narrow aisles look efficient on paper and destroy picking speed, damage caps and block the fresh-air throw pattern from the duct.
- 4
Specify steel by weight, not by 'rack count'
Racks are procured by MS angle and MS jali weight. Comparing a rack quotation without the kilogram figures is meaningless — that is where thin sections get substituted.
- 5
Protect the steel
Racks live at 85–90% RH. Specify surface prep plus an anti-corrosive primer and finish coat, and re-coat on a scheduled interval; black PET wire is used for bed retention.
Reference data
MS rack material per room (wastage already included)
| Room | MS angle | MS jali | PET wire | Compost bags served |
|---|---|---|---|---|
| 18×30 ft | 1,550 kg | 155 kg | 55 kg | 1,000 bags |
| 18×40 ft | 2,050 kg | 225 kg | 80 kg | 1,600 bags |
| 18×60 ft | 3,260 kg | 350 kg | 125 kg | 2,500 bags |
| 18×70 ft | 3,960 kg | 465 kg | 150 kg | 3,000 bags |
18×30 ft
- MS angle
- 1,550 kg
- MS jali
- 155 kg
- PET wire
- 55 kg
- Compost bags served
- 1,000 bags
18×40 ft
- MS angle
- 2,050 kg
- MS jali
- 225 kg
- PET wire
- 80 kg
- Compost bags served
- 1,600 bags
18×60 ft
- MS angle
- 3,260 kg
- MS jali
- 350 kg
- PET wire
- 125 kg
- Compost bags served
- 2,500 bags
18×70 ft
- MS angle
- 3,960 kg
- MS jali
- 465 kg
- PET wire
- 150 kg
- Compost bags served
- 3,000 bags
Geometry targets
| Parameter | Standard |
|---|---|
| Tiers per rack | 7 |
| Clear space per tier | 400–450 mm |
| Bed width | ~1.2 m (worked from both sides) |
| Aisle width | 750–900 mm |
| Lowest tier off floor | ≥ 150 mm (for washdown and airflow) |
Tiers per rack
- Standard
- 7
Clear space per tier
- Standard
- 400–450 mm
Bed width
- Standard
- ~1.2 m (worked from both sides)
Aisle width
- Standard
- 750–900 mm
Lowest tier off floor
- Standard
- ≥ 150 mm (for washdown and airflow)
- MS rack scope is quoted as a range in the BOQ because steel rates move; rates are ex-GST and transportation is extra.
- Racks are an optional line in MushroomWale quotations — some clients fabricate locally against our drawing.
Frequently asked questions
Related engineering pages
Talk to a MushroomWale engineer
Send your question on MS Mushroom Growing Rack Design & Height Standards and our project engineer will verify the sizing for your site — no cost, no obligation.
Want these numbers applied to your own site?
Share your plot size and target capacity — our engineers return a sized BOQ with room, machine and compost figures.
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