SPIRAL STAIR CASIS
Whitten Model 20 is the most econom-
ical answer to finding an inexpensive, quality, rigid
spiral staircase for interior or exterior installations.
Although the Whitten 20 is competitively priced,
it is not a kit. It is a completely assembled Whitten
one-piece welded staircase ready for installation
when you receive it. One-piece construction ensures
the safest, most rigid stair possible and reduces
on-site installation time to a minimum. This model
20 is delivered complete with platform, hand rail
and circular base mounting plate at no extra cost.
One-piece welded construction
Ideal for interior or exterior locations
Tough, durable, steel construction
Bent pan treads reduce tread deflection
Factory-welded round hand rails and
90 top platform and attached handrail at
no additional cost
Available in a selection of 4 practical
Easy to plan for, convenient to order
Quick delivery, fast installation
Whitten Quality guarantee for workman-
ship and materials
Height- any height and any number of floors
Diameters (4 sizes)-42" dia., 48" dia., 54"
dia., 60" dia.
Center column-3V2" and 4" o.d. steel pipe
Pan stair treads V." thick steel plate
Base plate V," x 8" diameter, round, drilled
for 3 mounting bolts
Spindles V7" o.d. pipe
Handrail IK(6" o.d. pipe
All sizes use 22Vi treads (16 to a circle) for
maximum headroom clearance & com-
SPIRAL STAIR IN ALLATION PLAR ING GUIDE
The sketches and diagrams below illustrate several of the basic
terms encountered when planning a spiral stair installation. We hope
this guide will be of some help in planning your installation. Since
all Whitten Staircases are custom made, one-piece, welded units,
fabricated to the specifications of each order, we can design a
staircase to solve any unusual location problem not covered in
CONVENTIONAL BALCONY ALTERNATE BALCONY
Platform fastens to one P/ platform fastens to one
edge of upper floor edge of upper floor
BALCONY (CORNER MOUNT)
Fastened to outside corner
of balcony or upper floor
(Platform not required)
Diagrams show use of standard 90 top
platform fastened to the second floor on
two sides. All stairs with platforms have
handrail on oneplatform side. Additional
matching hand railings to enclose stair-
wells and balcony edges are available.
Contact us for individual price quota-
tions. Note: The staircase center column
is available in any height and may also
be used as a supporting column.
ARCHITECT SPIRAL STAIRS SPECIFICATIONS
Furnish and install as indicated on plans, Whitten Staircase Model # Manufactured by Whitten
Enterprises, Inc., 205 Northside Drive, Bennington, Vermont 05201. Spiral stairs, in di-
ameter, __ finished floor to floor height. Left hand __or Right hand Spiral down,
O Tread units to be of Smooth platb 0 Diamond plate El Drilled to receive wood. Other
according to directions supplied by Whitten Enterprises, Inc.
I I? M :w.
WHITTEN ENTERPRISES, INC.
205 Northside Drive, Bennington,ermont 05201
Area Code 802-442-8344
COPYRIGHT 1974 SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.
Printed in U.S.A.
Stair treads to meet special
requirements may be selected
as a special order item. We
recommend the use of slip-
retarding diamond plate treads
for exterior installations or
safety tread strips (pressure
sensitive) apply directly to the
smooth steel tread. Wood treads
are available in solid oak. to
add the warmth of wood to your
decor, and plywood for carpet