HOLELESS – Single & Two Stage Jacks

TWIN JACK HOLELESS CAR
TYPE SUMMARY

This design uses (2) jacks, one on each side of the car, positioned between the platform and the hoistway wall. Single stage jacks are used for low travel, typically on 2 stop cars up to 14 ft. Two stage jacks are used for travel up to 28 to 30 feet (typically 3 to 4 stops).

Advantages

The jacks are located above ground, thereby eliminating the need to drill a jack hole and eliminating the risk of oil contamination. This car type will also accommodate low and high capacity cars.

Disadvantages

Travel is typically restricted to a 2 to 4 stop application. Depending upon the travel, an extended overhead may be required to fit the jacks into the hoistway elevation. The hoistway width requirement may also be a little greater than an in-ground car type, for high capacity applications.

LOW CAPACITY STANDARD DIMENSION & SPECIFICATION CHART
Capacity (lbs.) Openings F=Front R=Rear Door Type and Width Platform Size W(C) X D(D) Hoistway Depth Platform Plus Hoistway Size W(A) X D(B) Clear Inside W X D Running Clearance Sill/Plat Sill Depth Req'd' DOWNLOADS
2100 F 1-SP 36" 6'-0" X 5'-1" 9" 7'-4" X 5'-10" 5'-8" X 4'-3" 1" 5" PDF DWG
2100 F&R 1-SP 36" 6'-0" X 5'-8" 12" 7'-4" X 6'-8" 5'-8" X 4'-4" 1" 5" PDF DWG
2500 F 1-SP 42" 7'-0" X 5'-1" 9" 8'-4" X 5'-10" 6'-8" X 4'-3" 1" 5" PDF DWG
2500 F&R 1-SP 42" 7'-0" X 5'-8" 12" 8'-4" X 6'-8" 8'-8" X 4'-4" 1" 5" PDF DWG
3000 F 1-SP 42" 7'-0" X 5'-6" 9" 8'-4" X 6'-3" 6'-8" X 4'-8" 1" 5" PDF DWG
3000 F&R 1-SP 42" 7'-0" X 5'-11" 12" 8'-4" X 6'-11" 6'-8" X 4'-7" 1" 5" PDF DWG
3500 F 1-SP 42" 7'-0" X 6'-3" 9" 8'-4" X 7' 6'-8" X 5'-5" 1" 5" PDF DWG
3500 F&R 1-SP 42" 7'-0" X 6'-9" 12" 8'-4" X 7'-9" 6'-8" X 5'-5" 1" 5" PDF DWG
3500H F 2-SP 42" 5'-4" X 8'-4" 11" 6'-8" X 9'-3" 5'-0" X 7'-4" 1" 6½" PDF DWG
3500H F&R 2-SP 42" 5'-4" X 9'-0" 15" 6'-8" X 10'-3" 5'-0" X 7'-4" 1" 6½" PDF DWG
4000 F 1-SP 48" 8'-0" X 6'-3" 9" 9'-4" X 7' 7'-8" X 5'-5" 1" 5" PDF DWG
4000 F&R 1-SP 48" 8'-0" X 6'-9" 12" 9'-4" X 7'-9" 7'-8" X 5'-5" 1" 5" PDF DWG
4000H F 2-SP 48" 6'-0" X 8'-5" 11" 7'-4" X 9'-3" 5'-8" X 7'-5" 1" 6½" PDF DWG
4000H F&R 2-SP 48" 6'-0" X 9'-1" 15" 7'-4" X 10'-4" 5'-8" X 7'-5" 1" 6½" PDF DWG
4500H F 2-SP 48" 6'-0" X 8'-9" 11" 7'-4" X 9'-7" 5'-8" X 7'-9" 1" 6½" PDF DWG
4500H F&R 2-SP 48" 6'-0" X 9'-6" 15" 7'-4" X 10'-9" 5'-8" X 7'-10" 1" 6½" PDF DWG
5000H F 2-SP 48" 6'-0" X 9'-8" 11" 7'-6" X 10'-7" 5'-8" X 8'-8" 1" 6½" PDF DWG
5000H F&R 2-SP 48" 6'-0" X 10'-4" 15" 7'-6" X 11'-7" 5'-8" X 8'-8" 1" 6½" PDF DWG

OVERHEAD REQUIRED QUICK CALCULATION

Regardless of what the travel is, the standard mimimum overhead is 12′-6″. Consult your Delaware Elevator representative if your overhead is less than 12′-6″. For every 1″ of travel over 12′-0″ either the overhead or the pit depth must be increased by a corresponding 1″.

Pit Depth 4'-0"
Piston Bottom Undertravel 9"
Car Speed Up To 150 FPM
Cab Height 8'-0"
Piston Top Overtravel 5"

MAXIMUM INSIDE NET PLATFORM AREAS

To allow for variations in cab designs, an increase in the maximum inside net platform area not exceeding 5% shall be permitted for the various capacity loads.

Rated Capacity (Lbs.) Inside Net Area (Sq. Ft.)
2100 24.2
2500 29.1
3000 33.7
3500 38.0
4000 42.2
4500 46.2
5000 50.0

APPROXIMATE CLEAR INSIDE DIMENSIONS OF CAB

Width = Platform Width less 4″
Depth = Front Open Only
· SSSO & CO Doors = Platform Depth Less 10″
· 2SSO Doors = Platform Depth less 12″

Depth = Front & Rear Open
· SSSO & CO Doors = Platform Depth Less 16″
· 2SSO Doors = Platform Depth less 20″

DBG (Distance Between Guides) = Platform Width plus 3 1/4″ 15# rail depth= 3 1/2″

RAIL BRACKET FASTENING TO HOISTWAY WALLS

Hoistway wall supports for rail bracket fastening are required per the layout drawing locations. For block or masonary walls, wall inserts must be installed in the walls by OTHER than the Elevator Contractor. Masonary block mus be filled with mortar around Wall Inserts to provide a solid permanent rail bracket support.
For wood and metal stud hoistway walls, covered with sheetrock, a suitable header support (running front-to-back on each hoistway side wall) is required at each rail bracket location as per the rail force and location shown on the job specific layout drawing.

OVERHEAD REQUIRED - QUICK CALCULATIONS

SINGLE STAGE JACKS

UP to 100 FPM:
Pit Depth = 4’-0”
Overhead = 12’-6”
Top Over Travel = 3.5”
Bottom Over Travel = 5.0”
Max. Travel = 13’-10”
Max. “Overall” Cab Height = 8’-6”
101-125 FPM:
Pit Depth = 4’-0”
Overhead = 12’-6”
Top Over Travel = 4.25”
Bottom Over Travel = 7.25”
Max. Travel = 13’-4”
Max. “Overall” Cab Height = 8’-6”

TWO STAGE JACKS

UP to 100 FPM:
Pit Depth = 4’-0”
Overhead = 12’-6”
Top Over Travel = 7.5”
Bottom Over Travel = 5.5”
Max. Travel = 24’-4”
Max. “Overall” Cab Height = 8’-2”
101-125 FPM:
Pit Depth = 4’-0”
Overhead = 12’-6”
Top Over Travel = 9.0”
Bottom Over Travel = 7.0”
Max. Travel = 24’-4”
Max. “Overall” Cab Height = 8’-2”

APPROXIMATE CLEAR INSIDE DIMENSIONS OF CAB

Width = Platform Width less 4″

Depth = Front Open Only
· SSSO & CO Doors = Platform Depth Less 10″
· 2SSO Doors = Platform Depth less 12″

Depth = Front & Rear Open
· SSSO & CO Doors = Platform Depth Less 16″
· 2SSO Doors = Platform Depth less 20″

DBG (Distance Between Guides) = Platform Width plus 3 1/4″ 15# rail depth= 3 1/2″

DEM can provide not only standard sizes as outlined above but also non-standard or custom sizes. Please consult DEM for details.