Given the lab data in Table $1,$ classify the soil.

$\backslash$table$[[$Sieve No$,\%$ Passing,Additional Data$],[4,>68\mathrm{.}5,$Liquid limit $-34\mathrm{.}8\%],[10,68\mathrm{.}5,$Plastic limit $-17\mathrm{.}5\%],[20,54\mathrm{.}9,$Soil displays low level of firmness.$],[40,36\mathrm{.}1,],[60,-,],[100,22\mathrm{.}5,],[200,18\mathrm{.}1,]]$

Based on the data and the classification of the soil type, determine the design of a timbering for excavation in such soil. Explain factors influencing your decision and give details of the design.