A slab bolster upper for supporting rebars in a reinforced concrete structure, the slab bolster upper comprising:
- an elongated base defining a lower supportive surface, an upper surface for supporting the rebars, a first edge and a second edge opposite the first edge, the upper surface being in vertical alignment with the lower supportive surface;
- a plurality of discrete voids formed through the elongated base to facilitate free flow of concrete therethrough and around the elongated base;
- a first connexion comprising:
- a first connexion female connector member outwardly extending from the first edge about the lower supportive surface for locking with a corresponding second connexion male connector member of another slab bolster upper, the first connexion female connector member comprising a lower main portion outwardly extending from the first edge and a longitudinal opening defined within the lower main portion;
- and
- a first connexion male connector member outwardly extending from the first edge about the upper surface for engaging with a corresponding second connexion female connector member of the other slab bolster upper;
- and
- a second connexion comprising:
- a second connexion male connector member outwardly extending from the second edge about the lower supportive surface for locking with a corresponding first connexion female connector member of the other slab bolster upper, the second connexion male connector member comprising a lower structural portion outwardly extending from the second edge and a lower engaging member upwardly extending from the lower structural portion towards the upper surface of the elongated base when the elongated base is supported by the lower supportive surface for securely locking with the first connexion female connector member while interfacing the longitudinal opening defined within the lower main portion;
- and
- a second connexion female connector member outwardly extending from the second edge about the upper surface for engaging with a corresponding first connexion male connector member of the other slab bolster upper, the elongated base, the first connexion female connector member, the first connexion male connector member, the second connexion male connector member and the second connexion female connector member being integrally formed;
- wherein the first connexion is configured to securely lock with a corresponding second connexion of the other slab bolster upper and the second connexion is configured to securely lock with a corresponding first connexion of the other slab bolster upper for interconnecting a plurality of slab bolster uppers together.