The hadron calorimeter design and construction

The design of the LI-ICb Hadron Calorimeter is being described in this note. An internal structure consisting of thin iron plates interspaced with scintillating tiles have been chosen. The IICAL consists of two symmetric movable parts getting in touch in operation position without non-instrumented zones. The Iateral dimensions of the I-ICAL active area is of X=8.4 m in width, Y=6.8 m in height, and is distanced from the interaction point, at, Z=13.33 m. Both halfs are assembled from stacked up modules. Each half of about 245 tonn is located on the separate platform. Attention is paid to the strength analysis of the module as a basic assembling unit. Different phases are being discussed: the iron plates glueing, the submodtile and module construction, the scintillating tiles and fibers preparation for insertion, the pre-installation test and calibration. The documentation incorporates a set of tools needed for detector assembly. In the summary the construction rate is estimated.