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About Us
SERIES 300
Rolling Steel Series 300 Commercial Rolling Slat Door
The Janus International 300 Series Commercial Rolling Slat Door is produced with the highest quality and durability in the industry. The 300 Series consists of 3" – 24 or 22-gauge slats made from commercial-grade galvanized steel and coated with Super Durable polyester paint. Model 324, 24-gauge, is available in sizes up to 16' wide x 16' high. Model 322, 22-gauge, is available in sizes up to 12' wide x 12' high, both models are a perfect choice for freight terminals, commercial and industrial applications.
STANDARD FEATURES
- Roll formed 12-gauge galvanized guides
- Nylon endlocks
- Slide bolt locks
- Chain hoist operation
- Drum assembly with pre-installed curtain
- 4 finish options: white, gray, tan topcoats & galvanized
OPTIONS
- Steel Mounting Plates: For lateral jamb extension to provide door support.
- Top Draft Stop: Seals tight at the header to reduce air infiltration.
- Guide Weather Seal: Seals tight at the jambs to reduce air infiltration.
- Vision Lites: 5" x 3/4" cut out, spaced approx. 3" apart, covered with clear Lexan (flat slat only).
- Structural Steel Upgrade Guide: 3-piece structural steel guides.
- Windload: Available design to +40/-37 for 14' wide (test) Model 324 (24-gauge). Windload varies by model.
- Powder Coating: Available on all gauges, flat or curved profile. Consult factory for colors.
IDEAL APPLICATIONS
From the Janus applications video: the 300 and 400 Series rolling service doors deliver dependable everyday security. The 300 Series is the everyday choice for warehouse dock openings and commercial buildings that need a quality slat door at an economical price.
- Warehouses and distribution centers
- Freight terminals
- Commercial and industrial buildings
- Government and stadium service openings
Watch the rolling steel door applications video to see each series in use, or the rolling steel explainer video for the full line. Not sure which series fits? Try the door selector tool.
CLEARANCE REQUIREMENTS (CHAIN HOIST OR ELECTRIC OPERATOR)
| Opening Height | Up to 8' | Up to 10' | Up to 16' |
| A-1 | 7" | 7" | 7" |
| A-2 | 8" | 8" | 8" |
| X | 20" | 21" | 24" |
| Y | 9-1/2" | 10" | 11" |
| V | 20" | 21" | 24" |
Dimensions exclude the operator and apply to 12-gauge guides only. See the clearance requirements document for the dimension key.
DOCUMENTS
Shop Drawing - Model 322 with Chain Hoist and Structural Guides
Shop Drawing - Model 324 with Chain Hoist and Structural Guides
Shop Drawing - Model 324 with Motor and Structural Guides
Shop Drawing - Model 324 with Motor and Roll Formed Guides
Technical Specifications - 300 Series Standard
Technical Specifications - 300 Series Windload
Technical Specifications - 300 Series Windload Certified
Installation Instructions - Series 300 (8.5 x 11)
Installation Instructions - Series 300 (11 x 17)
PRODUCT HIGHLIGHTS
| Product Type | Steel | ||
| Model Description | Commercial Rolling Slat Door | ||
| Models | 324 (24-gauge), 322 (22-gauge) | ||
| Slat Profile | 3" flat or curved; 24- or 22-gauge commercial-grade galvanized steel | ||
| Maximum Size Width x Height | Model 324: 16' x 16' Model 322: 12' x 12' | ||
| Operation | Reduction gear chain hoist standard (all sizes); electric operator optional | ||
| Standard Guides | 12-gauge galvanized channels, 3-1/2" deep | ||
| Drum / Axle | 12" galvanized spiral torque tube on 16-gauge drums with sealed ball bearings | ||
| Bottom Bar | 2" x 1-1/2" x 12-gauge galvanized steel angle with PVC bulb astragal | ||
| Locking | Dual galvanized steel slide bolt locks (padlocks by others) | ||
| Finishes | White, gray, tan topcoat or galvanized; powder coating optional | ||
| Windload Option | Designed to +40/-37 PSF at 14' wide (Model 324); varies by model | ||
| Paint Warranty | 40-year film integrity / 25-year no-fade limited paint warranty | ||
Repair or replace?
Replacing an Aging Service Door Can Pay for Itself
Every repair extends the life of an aging door, and its hidden costs: downtime, labor, energy loss and safety risk. The Janus ROI Guide shows what replacement can return.
- A 10-dock warehouse investing $225,000 in new rolling steel doors could see about $93,000 a year in operating benefit: a 2.4-year payback and 41% annual ROI*
- Insulated doors on 4 docks could cut HVAC energy use about 12% in a 100,000 sq ft warehouse, worth $12,000 to $25,000 a year*
- Rolling steel doors last 25+ years with fewer major repairs, versus replacing lighter-duty doors every 12 to 15 years
*Illustrative examples from the Janus Rolling Steel Door Replacement ROI Guide. Actual results vary based on facility size, climate, usage frequency, labor costs and door specifications.
Applications
Where the 300 Series Works Best
From the Janus Rolling Steel Application Guide.
- Government
- Manufacturing
- Stadiums
- Warehouse
Door Selector Tool
Find the Right Rolling Steel Door in Minutes
Answer eight quick questions about the building, the opening and how the door will be used. The Door Selector shows every Janus rolling steel, commercial sheet and mini door that fits, with specifications, door sheets and a quote link on every result.
- Pick the building type and application
- Set wind load, fire rating and daily cycles
- See every matching door with specs and quote links
Videos
See Janus Rolling Steel in Action
RESOURCE
The Complete Guide to Commercial Doors.
Explore our full line of commercial sheet doors and rolling steel doors in one convenient resource. Compare products, review specifications, and discover the right solution for virtually any application.
Ready to Spec the 300 Series?
Tell us about the opening and a Janus commercial team member will help you find the right door, fast.