Hollow_ app for iPhone and iPad

Apps for design and validate unity check of Hollow Structure Section, unity check is the ratio between actual stress compare to allowable stress in accordance with Code and Standard.
AISC ASD 9th edition 1989 is used for the design.
User could customise section’s size and design parameter, the program have function to compile the Calculation Report and send it through email. Format of the Report is suitable for standard miscellaneous structure design calculation.
Two available option of design unit : kN-m or kips-ft, geometry size use millimetre or inch.
This program could be used for section’s properties calculator that include calculation of torsion constant “J”, or weight calculator to estimate beam’s weight per length.