Enclosed beams are steel beams that are completely encased in cement concrete along their full length. The cased beam is depicted in the diagram below.


When the following conditions are met, beams can be designed as enclosed beams, according to IS 800:1984.

a) The section is made up of a single web in an I-shape or a double open channel with webs spaced at least 40mm apart.

b) The steel section’s overall dimensions, including any overlapping, do not exceed 750mm x 450mm, with the bigger measurement measured parallel to the web.

c) The beam is enclosed in dense concrete of at least M15 strength.

d) Solid casing must have a minimum width of

where the width of the steel beam flange is measured in millimetres

e) The beam’s surface and edges must have a minimum coverage of 50mm.

f) Steel wire with a diameter of at least 5mm is used to strengthen the casing in the form of stirrups or binding with a pitch of no more than 150mm.

g) At splices, the steel cores must be correctly cut, and provisions should be provided for column alignment.

h) A suitable system for transferring the load to the footing should be made at the column base.


a) The entire weight is carried by the steel beam portion.

b) For the purpose of establishing the allowed stress in compression, concrete adds to the lateral stability of the compression flange.

c) The moment of inertia equivalent,clip image008 is equal to on the y-y axis, where A is the steel section’s area and can be used in a variety of ways.where clip is the flange width in millimetres.

d) The above-mentioned allowed bending stress should not exceed 1.5 times that of encased parts.

The four steel-beam-producing constructors will be placed next. Place four constructors from the first to the fourth row in the fourth column, facing the grid’s centre. Then run a merging line down the outputs, with the three mergers flowing forward and flat against the concrete line’s initial three mergers. We’ll additionally set splitters in front of the inputs of the first three constructors. We can now connect all of the manifolds with conveyors, with the exception of the steel ingot manifold, which will require an MK3 belt. Ensure that these four constructors are connected to steel beams from here.

Start by placing two splitters flowing forwards just in front of the nearest edge of the sixth row to create a double manifold in the sixth row. They should be parallel to the prior concrete and steel beam merging lines. Stack a second splitter on top of the first, then delete the splitter beneath it. At this point, the front outputs of each splitter will be sent into the first assembler, and two more splitters will be run on both the top and bottom manifolds, feeding into the two adjacent assemblers. Set the assemblers to enclosed industrial beams for all three. One assembler should be set to 50% clock speed, while the other two should be set to 100%.

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