It is easy to think of using sawtooth steel plate on the surface of column to increase the interfacial friction in the temporary RC column underpinning structure. However. there is little research on the friction properties between sawtooth steel plate and concrete. 108 working condition of double interface shear tests were conducted for measuring the friction coefficient between the ... https://www.diegojavierfares.com/bargain-Merlin-the-Magical-Wizard-Boys-Costume-special-save/