Experimental demonstration of the TMP unit cell with in-situ transition between collapsible and load-bearing states. a) View of the TMP with two different initial folded states: (i) collapsible (\(\gamma_0=0.21\)) and (ii) load-bearing configurations (\(\gamma_0=0.37\)). b) Digital images of (i) collapsible and (ii) load-bearing prototypes with the self-folding crease lines denoted by the arrows. c) Experimentally measured force-displacement curves (dashed curves with colored bands representing mean values with standard deviations) are compared with the analytical prediction from the rigid origami model (solid curves). d) The initial (Left) and final (Right) shapes of the cross-section under loading. e) The surface plot of the maximum force required to compress the TMP as a function of \(\gamma_0\) and \(\alpha\). The markers denoted by the arrows (i) and (ii) correspond to the prototypes of the collapsible and load-bearing configurations, respectively. The gray horizontal line is at $\alpha = 57^{\circ}$, corresponding to the boundary between the configurations with/without load-bearing capability. % as denoted by the blue arrow in Fig.~\ref{fig:Kinematics}\textit{B}. (\textit{F}) Cyclic loading is applied to demonstrate the in-situ transition between the two configurations. The maximum force required to compress the TMP is measured, and is normalized by the force in the first cycle. The insets illustrate the target configurations.