the wall studs into the framework ensures acceptable blast ballistic and forced entry resistance even if the welds are flawed application_number US 201715461226 A description fig1 49 illustrate the components of an exemplary embodiment anti ballistic shelter unit 100 fig1 illustrates unit 100 including base assembly 10 top assembly 20 endwall assembly 30 with door endwall assembly 40 with window and sidewall assemblies 60 with windows unit 100 has a weight of approximately 58 970 lbs well within the requirements for iso containers fig2 illustrates base assembly 10 including floor girders 11 floor roof support beams 12 channeled floor roof support beams 13 and floor 14 base assembly 10 has a weight of approximately 6 900 lbs fig3 and 4 illustrate floor girders 11 which have a length of 39 125 feet and a hollow structural cross section of 10 by 5 by u215c inches as seen in fig4 floor girder 11 may include multiple stud apertures 15 spaced apart 16 inches apart at center this critical dimension provides optimum structural integrity to any assembly utilizing stud apertures 15 without increasing weight to the point that it violates iso standards fig5 illustrates floor roof support beam 12 which has a length of 7 125 feet and a hollow structural cross section of 3 by 3 by 5 16 inches fig6 illustrates channeled floor roof support beam 13 which has a length of 9.