Tensor hierarchy algebras were orginally introduced to describe gaugings of maximal supergravity theories, by extending the global U-duality symmetry of the ungauged theory to an infinite-dimensional Lie superalgebra. I will in my talk describe how an analougous extension of E11 can be used to describe the bosonic sector of eleven-dimensional supergravity, as an alternative to West's proposal, discussed by Axel Kleinschmidt in his talk. In particular, the tensor hierarchy algebra provides a simple and unified description of gauge invariant field strengths, Bianchi identities and duality equations. The talk is based on 1703.01305 with Bossard, Kleinschmidt, Pope and Sezgin