1592953489000 1312632483000 term-53936 1616541609654 1312632548000 1616290618089 adlib fitz-online adlib-term-53936 f9b4ddb9-0a5b-317b-bced-578f2deb9ff7 2 1 simply supported beams simply supported beams term reference term-53938 adlib-term-53938 6e4ed8ae-c746-3b88-8b45-16e18769b1c9 simple beams