  The physical properties of the single-crystalline samples of Lu_{2} Ir_{3}
Si_{5} have been investigated by magnetic susceptibility, resistivity and heat
capacity studies. We observed multiple charge density wave (CDW) transitions in
all the measurements. A strong thermal hysteresis at these transitions suggests
a possible first order CDW ordering. In addition, the first order nature is
ascertained by a very narrow and a huge cusp (62 J/mol K) in the zero field
specific heat data which also suggests a strong interchain coupling. By
applying a field of 9T in the specific heat measurement, one of the CDW
transitions is suppressed.
