Planar Auditorium Seating Planning, Installation & Specification Manual 5
Planar Product Advantages
Gravity Tip-Up Seat The Planar seat tip-up action is attained by the use of a gravity counterweight mechanism.
The advantages of a gravity mechanism over a spring or cylinder mechanism are as follows:
Consistent and automatic return to the upright position. Spring mechanisms can have inconsistent tip-up
action due to the variation of the strength or fatigue of the steel springs. This affects the aesthetics of the room
and may affect compliance with egress codes since the seats may not return to a consistent upright position.
Silent action. Spring mechanisms are likely to develop squeaks and normally produce several loud hits before
coming to a stop.
Seat tip-up will never fail. Because the Planar mechanism relies on gravity, it will never fail to return the seat to
its upright position. In contrast, as a spring mechanism fatigues, the seat tip-up action will get slower.
Eventually, the spring mechanism may fail to return the seat to the upright position, producing a possible
violation of egress codes.
Seat Construction The Planar seat construction is patterned after office chairs for long-term comfort and durability.
Flexible polyurethane foam is glued directly to the structure of the seat. The advantages of this type of construction
are as follows:
Silence, durability, comfort. Seats constructed with serpentine springs often fatigue, sag and fail. This creates
an uncomfortable and noisy seat, which may require replacement. TSI’s flexible polyurethane foam construction
offers significant user comfort over long seating periods. Additionally, the absence of steel springs insures
completely silent compression during use.
Upholstered options. Unlike metal seat pans with serpentine springs, Planar’s all-wood construction allows for
custom upholstery detailing. The fully-upholstered seat has a zippered slip-on fabric cover for easier on-site
replacement.
TSI Chair Frames The Planar frames are welded assemblies of heavy gauge and solid steel components. The
advantages of this type of construction are listed below:
Flexibility. The Planar’s welded steel assembly allows for simple and cost efficient design modifications for
conformance to unique building conditions. Unlike high volume castings, welded construction facilitates small
production run modifications.
Cost of Ownership Due to the obvious product advantages of Planar seating as mentioned above, and the superior
service and warranty levels offered by TSI, purchasing Planar seating is a better long-term value. The initial savings
associated with the purchase of a less expensive chair is likely to be lost through ongoing maintenance and
replacement during the lifetime of the product.
(4 pages)
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