February 20, 1998
Specifications/Standards - Ergonomic
DATE ISSUED: February 20, 1998
The attached ergonomic chair specifications
have been developed by a task force of the Council of Environmental
Health and Safety Officers (EH&S) in cooperation with the
Procurement and Support Services Officers Association.
These specifications were developed with a view
toward addressing ergonomic requirements for employees of both
genders that fit within a 95% range for height. The specifications
are intended to be inclusive and not exclusive in relationship to
production chairs available on the open market. Major furniture
manufacturers and Prison Industry Authority currently carry chairs
which meet these minimum ergonomic specifications.
These specifications may be used, at the
discretion of the campus, to supplement campus requirements for
furniture acquisitions. Durability and cost of product was not a
factor in the preparation of these specifications.
Ergonomic Task Force Members:
Stephen Orsak, [Chair] Director, EH&S,
CSUSM, (760) 750-4510
William Cooper, Director, Purchasing, CSUN,
Ray Macias, Director, Support Services,
SLO, (805) 756-2234
Charles Hughes, Director, Procurement,
CSULB, (562) 985-4296
Barbara Brenner, Director, EH&S, CSUB,
Helen Snyder, Human Services Specialist,
Sonoma (707) 664-2932
Sherry Dorithy, Product Manager, Wood &
Metal, PIA, (916) 358-1758
This specification is intended to address
employees of both sex that fall into the 95th percentile range of
height. Employees that fall outside this perimeter will be
accommodated with the purchase of special ergonomic chairs. Special
ergonomic chairs are not the subject of these specifications.
Environmental Health and Safety Services at each campus should be
consulted if special ergonomic chairs are required. This
specification will address the following type of chairs:
a) Manager/Executive chair
b) Support Staff task chair
Specifications for both types of chairs (a
1) The chair base will have a five point base
unit with casters that will roll across carpeted floors without
pulling the carpet into the caster housing. The casters should be
large enough to require a minimum of effort to move the chair. The
five point base will measure not less than twenty-three inches
2) The set pan will be adjustable for forward
and backward tilt angle independent of lumbar support
3) The forward leading edge of the seat pan
will cascade to a rounded edge that has a downward sloping angle, and
shall have a concave contour for even weight distribution. The
cushion deformation measured at the center of the seat pan shall be
no more than one inch, as measured from a plane formed by a straight
edge laid across the top of the seat of the pan.
4) The entire upper chair assembly will be
capable of 360 rotation.
5) The backrest will be contoured to provide
lumbar support and be adjustable for height and for angles ranging
from behind the vertical to forward of the vertical position. The
back support will have a vertical height adjustment span of at least
three and one-half inches. The height adjustment may be achieved with
one gross adjustment or with a combination of adjustment
6) Arm supports shall be adjustable for height
and be removable. The height adjustment will be at least two and one
half inches, as measured from the lowest position of the armrest to
the full-extended position of the armrest. The armrest should be
easily removed and adjustable without the use of tools.
7) All adjustment mechanisms will be readily
operable and within easy reach of the chair user. Adjustments will be
capable of being accomplished without the use of tools. It is
preferred that adjustment mechanisms be provided with labels as to
1) The roller casters should be removable and
capable of being replaced.
2) The seat pan of the Support Staff Chair will
measure at least 16" deep and 19" wide as measured from the front of
the seat pan to the rear of the pan, and from one side of the pan to
the other side of the plan. The seat pan of the Manager/Executive
chair will measure at least 16" deep and 22" wide, as measured from
the same points as the Support Staff chair.
3) The lumbar support and seat cushion is to be
composed of high-density foam material.
4) The Support Staff Chair will be available
with height adjustment from 16" to 21" as measured from the floor to
the top edge of the seat pan. The Manager/Executive Chair will be
available with a height adjustment from 17" to 22". The height is
measured when the chair is in an uncompressed state.
5) The Manager/Executive Chair will have a
backrest that measures at least 22" in height as measured from the
bottom of the backrest to the top of the backrest. The Support Staff
Chair will have a backrest that is at least 16" in height, as
measured from the bottom of the backrest to the top of the
6) The seat pan of both chairs will adjust
forward at least 2". This action will move the seat pan forward away
from the backrest for the prescribed distance and provide a longer
seat pan reach.
7) Both chairs will meet or exceed ANSI/BIFMA
(X5.1), 1993 Standards.