Main Structure.

System steelwork structure Atlas Ward is based on portal frames pinned at foundation. All the main load-carrying elements are made as welded plate girders of variable height and flanges at the length. The application of plate girders and their pinned connection with foundation allow the structure "to follow" the natural stress distribution and allow design engineers to use load carrying-capacity of steel in an optimal manner.

An important feature of halls constructed in Atlas Ward system is the stiffness of load-carrying structure - steelwork structure of halls is a self-supporting structure without taking stiffening with roof sheathing and wall cladding into consideration.

This unique feature was reached by designing special elements of secondary supporting structure - wall transoms and roof purlins co-operate with the main load-carrying elements, thus ensuring their stiffness.

Owing to this fact, halls constructed in our system are not subject to any limitations in terms of kind, span or weight of cladding.

steel saving:	Steel frame made from plate girders uses load-carrying capacity of steel with great precision; due to this fact, structure is light and economical.
concrete saving:	Stiff frame and pinned connection with foundation allows for reduction of dimensions of foundations - less concrete means lower costs of project.
stability of structure:	Application of secondary elements as structural stiffening allows for elimination of roof sheathing and wall cladding in their function of load-carrying elements.
optional cladding:	Owing to ensuring adequate stiffness of structural system [cf. point above], Atlas Ward system allows for selecting any kind of cladding on account of its kind, span, weight.
system openness:	Atlas Ward is an open building system, offering any kind of system, height and span of bays of steelwork halls, as well as any kind of roof sheathing and wall cladding.

Hall structure is made from high-quality and high-strength steel [18G2A and S355] in steel plants possessing appropriate attestations and certificates and guaranteeing high quality of manufactured elements.

All elements are cleaned in a shot blasting process to purity level Sa 2 1/2. Anti-corrosive protection of structure is ensured by applying primer and top-coat paint from a set of paint appropriate on account of environmental aggressiveness.

Atlas system allows for designing and implementation of any system and functional program of a hall on the basis of a typical frame with webs meeting one another.

The preferred frame diagrams are listed in the table below, however, owing to system openness and that fact that we have our own design office, we are ready for every task in the scope of steelwork structures.

Static systems of halls: 

PREFERRED FRAME TYPES symbol marking	ATTENTION! All dimensions of a hall, such as: span, clear height, eaves height, roof pitch - are virtually optional. They are only subject to Investor's requirements and economical optimization of the particular design.
ACL one-bay hall pitched roof	span without intermediate supports up to 100 m
AMO one-bay hall monopitch roof
APR 2/3/4 multi-bay hall symmetrical pitched roof
AMU 2/3/4 multi-bay hall symmetrical pitched roofs
ALE extension
ACA canopy roof cantilever
TENIS sports hall one bay gambrel roof
OTHER SYSTEMS  any configuration of basic series of types
OVERHEAD CRANES  overhead cranes can be provided for in every hall system

System steelwork structure includes:

Foundation anchors

• anchors type J or U made from high-strength steel ensure pinned connections of column with foundation
• anchors equipped with restraint angle
• selection of anchors and their distribution is made basing on static calculations
• scope of delivery includes patterns and a set of leveling plates

Gable frames

• lightweight frames with horizontal flanges
• posts supporting transom spaced every 5,00 - 6,00 m
• pinned connections between elements
• bracing ensuring stiffness of frame
• posts pinned at foundation

Main frames

• they constitute load-carrying structure of a hall
• maximal frame spacing: 12,00 m [with purlins of Multibeam type]
• one- or multi-bay
• elements of variable height and width
• stiff beam-to-column connection using high-strength bolts
• pinned connection between column and foundation

Bracing

• wall and roof [roof slope] bracings are present in a hall
• bracings transmit forces from wind pressure and structure stabilization onto foundations
• location of bracings is adjusted the function of a hall

Additional elements

• ceiling beams, main floor beams
• crane beams with bridge rail and stop, brackets under beams
• portal bracings
• cantilever canopy roofs
• fastened columns

Characteristic solutions of system connections

Pinned connection between foundation and column	Columns and wall transom system	Stiff corner in eaves
Roof transoms and purlin systems	Stiff connection at roof ridge