Formwork support system and method of installing a formwork support system

1. A formwork support system comprising:

a first pair of support props,

a second pair of support props,

a longitudinal beam with opposite ends attached to the first pair of support props,

a longitudinal support with opposite ends attached to the second pair of support props, and

a cantilever beam extending transversely to the longitudinal beam and the longitudinal support, respectively, the cantilever beam being supported on an upper side of the longitudinal support, the cantilever beam having a first end secured to the longitudinal beam wherein each support prop has a leg and a head member mounted on an upper end of the leg, the head member having a support plate with an upper side, the head member having a lowering device for lowering a middle part of the head member with respect to the support plate, the leg having a lower leg part, an upper leg part, and a connecting device for securing the upper leg part in a plurality of vertical positions with respect to the lower leg part.

2. The formwork support system according to claim 1 , wherein the head members of the second pair of support props each have an extension device fixed to the support plate and extending upwards therefrom, the extension device having an upper support plate, a plurality of formwork sheets being supported on the support plates of the first pair of support props and the upper support plates of the second pair of support props.

3. A formwork support system comprising:

a first pair of support props,

a second pair of support props,

a longitudinal beam with opposite ends attached to the first pair of support props,

a longitudinal support with opposite ends attached to the second pair of support props, and

a cantilever beam extending transversely to the longitudinal beam and the longitudinal support, respectively, the cantilever beam being supported on an upper side of the longitudinal support, the cantilever beam having a first end secured to the longitudinal beam wherein a downwardly extending flange member is arranged at the first end of the cantilever beam, wherein the longitudinal beam has a lower slot extending in a longitudinal direction of the longitudinal beam, the flange member engaging the lower slot of the longitudinal beam.

4. The formwork support system according to claim 3 , wherein a tongue member and the flange member are spaced from one another in a longitudinal direction of the cantilever beam.

5. The formwork support system according to claim 3 , wherein a tongue member is pivotably arranged at the first end of the cantilever beam about a horizontal axis extending perpendicularly to a longitudinal direction of the cantilever beam.

6. A formwork support system comprising:

a first pair of support props,

a second pair of support props,

a longitudinal beam with opposite ends attached to the first pair of support props,

a longitudinal support with opposite ends attached to the second pair of support props,

a cantilever beam extending transversely to the longitudinal beam and the longitudinal support, respectively, the cantilever beam being supported on an upper side of the longitudinal support, the cantilever beam having a first end secured to the longitudinal beam, and

wherein an upwardly extending tongue member is arranged at the first end of the cantilever beam, wherein the longitudinal beam has an upper slot extending in a longitudinal direction of the longitudinal beam, the tongue member engaging the upper slot of the longitudinal beam.

7. The formwork support system according to claim 1 , wherein a sideward extending stop member is arranged at the first end of the cantilever beam.

8. The formwork support system according to claim 7 , wherein the stop member is a lateral nose of a tongue member or the lateral extension of a flange member.

9. A formwork support system comprising:

a first pair of support props,

a second pair of support props,

a longitudinal beam with opposite ends attached to the first pair of support props,

a longitudinal support with opposite ends attached to the second pair of support props, and

a cantilever beam extending transversely to the longitudinal beam and the longitudinal support, respectively, the cantilever beam being supported on an upper side of the longitudinal support, the cantilever beam having a first end secured to the longitudinal beam wherein a fall protection device is mounted on the cantilever beam at a second end.

10. The formwork support system according to claim 9 , wherein the fall protection device comprises a railing.

11. A method for installing a formwork support system, comprising the steps of:

arranging a first pair of support props on a floor of a building,

arranging a second pair of support props on the floor of the building,

attaching a first end and a second end of a longitudinal beam to the support props of the first pair of support props, respectively,

attaching a first end and a second end of a longitudinal support to the support props of the second pair of support props, respectively,

supporting a cantilever beam extending transversely to the longitudinal beam and the longitudinal support, respectively, on an upper side of the longitudinal support, and

securing a first end of the cantilever beam to the longitudinal beam,

wherein a protruding section of the cantilever beam horizontally extends beyond a floor edge of the floor.

12. The method according to claim 11 , wherein the formwork support system is installed at a marginal area of the floor of the building.

13. The method according to claim 12 , wherein the longitudinal support is arranged parallel to the floor edge at the marginal area of the building.

14. The method according to claim 11 , wherein a tongue member at the first end of the cantilever beam is engaged with an upper slot of the longitudinal beam for securing the cantilever beam to the longitudinal beam.

15. The method according to claim 11 , wherein the cantilever beam is initially supported on the longitudinal support in an interim position with a tongue member placed underneath and disengaged from an upper slot of the longitudinal beam, whereupon the cantilever beam is pivoted about its longitudinal direction so that the tongue member engages the upper slot.

16. The method according to claim 15 , wherein a fork instrument is operated from the floor to pivot the cantilever beam in order to engage the tongue member with the upper slot of the longitudinal beam.

17. The method according to claim 11 , wherein a fall protection element is mounted at a second end of the cantilever beam.