Scaffold system

1. A scaffold system adapted for securing to a structure and for vertical movement relative to the structure, the scaffold system comprising:

first and second wall mounts, each of the wall mounts comprising a bar and at least one spring biasing the bar in a first direction;

a slide post comprising a slide hook, a slide arm and a hanging pad secured to the slide arm, the slide post arranged for vertical axial movement within at least one of the first and second wall mounts;

a main post comprising at least one post hook;

a first deck fixedly secured to the main post; and,

a ball screw jack comprising a mounting plate and a lifting screw, the mounting plate secured to the first deck and the lifting screw secured to the hanging pad, wherein when said ball screw jack is powered said lifting screw causes the entire slide post to move upward at the same rate as the lifting screw, wherein the main post is arranged to complementarily fit within the slide post, the slide hook is adapted for releasable engagement with the first wall mount bar or the second wall mount bar and the at least one post hook is adapted for releasable engagement with the first wall mount bar or the second wall mount bar.

2. The scaffold system of claim 1 wherein the first wall mount is secured to the structure at a first height, the second wall mount is secured to the structure at a second height elevationally lower than the first height and the slide hook is releasably engaged with the first wall mount bar.

3. The scaffold system of claim 1 wherein the first wall mount is secured to the structure at a first height, the second wall mount is secured to the structure at a second height elevationally lower than the first height and the at least one post hook is releasably engaged with the second wall mount bar.

4. The scaffold system of claim 1 wherein the first wall mount is secured to the structure at a first height, the second wall mount is secured to the structure at a second height elevationally lower than the first height, the slide hook is releasably engaged with the first wall mount bar and the at least one post hook is releasably engaged with the second wall mount bar.

5. The scaffold system of claim 1 further comprising a third wall mount comprising a bar and at least one spring biasing the bar in a first direction, wherein the first wall mount is secured to the structure at a first height, the second wall mount is secured to the structure at a second height elevationally lower than the first height, the third wall mount is secured to the structure at a third height elevationally lower than the second height and the slide hook is releasably engaged with the first wall mount bar and the at least one post hook is releasably engaged with the third wall mount bar.

6. The scaffold system of claim 1 further comprising a third wall mount comprising a bar and at least one spring biasing the bar in a first direction, wherein the first wall mount is secured to the structure at a first height, the second wall mount is secured to the structure at a second height elevationally lower than the first height, the third wall mount is secured to the structure at a third height elevationally higher than the first height and the slide hook is releasably engaged with the third wall mount bar and the at least one post hook is releasably engaged with the first wall mount bar or the second wall mount bar.

7. The scaffold system of claim 1 further comprising at least one limit switch arranged to engage the hanging pad or the slide arm.

8. The scaffold system of claim 1 further comprising a second deck positioned elevationally higher than the first deck.

9. The scaffold system of claim 1 further comprising at least one safety lug secured to the structure and the first deck.

10. A method of modifying the height of a scaffold system mounted on a structure, the scaffold system comprising first and second wall mounts, a slide post comprising a slide hook, a slide arm and a hanging pad secured to the slide arm, a main post comprising at least one post hook, a first deck fixedly secured to the main post, and a ball screw jack comprising a mounting plate and a lifting screw, wherein each of the wall mounts comprises a bar and at least one spring biasing the bar in a first direction, the slide post is arranged for vertical axial movement within at least one of the first and second wall mounts, the mounting plate is secured to the first deck, the lifting screw is secured to the hanging pad, the main post is arranged to complementarily fit within the slide post, the slide hook is adapted for releasable engagement with the first wall mount bar or the second wall mount bar and the at least one post hook is adapted for releasable engagement with the first wall mount bar or the second wall mount bar, the method comprising:

a) securing the first wall mount to the structure at a first height and securing the second wall mount to the structure at a second height elevationally lower than the first height;

b) releasably engaging the at least one post hook with the second wall mount bar;

c) releasably engaging the slide hook with the first wall mount bar;

d) securing a third wall mount to the structure at a third height elevationally higher the first height, the third wall mount comprises a bar and at least one spring biasing the bar in a first direction;

e) energizing the ball screw jack, wherein the ball screw jack extends the lifting screw thereby increasing a vertical height of the slide post;

f) releasably engaging the slide hook with the third wall mount bar;

g) energizing the ball screw jack, wherein the ball screw jack retracts the lifting screw thereby increasing the vertical height of the main post; and,

h) releasably engaging the at least one post hook with first wall mount bar.

11. A method of modifying the height of a scaffold system mounted on a structure, the scaffold system comprising first and second wall mounts, a slide post comprising a slide hook, a slide arm and a hanging pad secured to the slide arm, a main post comprising at least one post hook, a first deck fixedly secured to the main post, and a ball screw jack comprising a mounting plate and a lifting screw, wherein each of the wall mounts comprises a bar and at least one spring biasing the bar in a first direction, the slide post is arranged for vertical axial movement within at least one of the first and second wall mounts, the mounting plate is secured to the first deck, the lifting screw is secured to the hanging pad, the main post is arranged to complementarily fit within the slide post, the slide hook is adapted for releasable engagement with the first wall mount bar or the second wall mount bar and the at least one post hook is adapted for releasable engagement with the first wall mount bar or the second wall mount bar, the method comprising:

a) securing the first wall mount to the structure at a first height and securing the second wall mount to the structure at a second height elevationally lower than the first height;

b) releasably engaging the at least one post hook with the second wall mount bar;

c) releasably engaging the slide hook with the first wall mount bar;

d) securing a third wall mount to the structure at a third height elevationally lower the second height, the third wall mount comprises a bar and at least one spring biasing the bar in a first direction;

e) energizing the ball screw jack, wherein the ball screw jack extends the lifting screw thereby decreasing a vertical height of the main post;

f) releasably engaging the at least one post hook with the third wall mount bar;

g) energizing the ball screw jack, wherein the ball screw jack retracts the lifting screw thereby decreasing the vertical height of the slide post; and,

h) releasably engaging the slide hook with second wall mount bar.