Abstract: The invention provides a device for housing steel reinforcement in areas where joints are made between first and subsequently poured concrete structures such that connecting portions of the steel reinforcements are isolated during pouring of the first concrete and are thereafter bent out for connecting the subsequently poured concrete structure. The device comprises a housing having an open box, a cover therefore, and anchoring strips disposed in the transverse direction of the box at intervals along its length and at the bottom thereof. The anchoring strips having transverse slots in the upper portion thereof to receive and support the connecting portions of the steel reinforcements. The cover is capable of being locked to the box and capable of passing the anchoring portions therethrough.