Roof scaffolding system

A roof scaffolding system, comprising:

• (a) at least one roof jack including
• (i) a rigid support frame having a pair of lower ends laterally spaced apart from one another and an upper apex located above and between said lower ends,
• (ii) a pair of support blocks each attached to one of said lower ends of said support frame and being adapted to rest on one inclined surface of a roof such that said support frame is spaced above the one inclined surface, and
• (iii) a rigid bar having an elongated main portion and opposite front and rear end portions, said rigid bar at said rear end portion being rigidly connected to said upper apex of said support frame and formed as a hook-shaped element extending upwardly from said main portion such that said main portion is adapted to support a portion of an elongated board and said hook-shaped element is adapted to retain the board on said main portion, said rigid bar at said front end portion being formed as a transverse extending front attachment key;
• (b) at least one support assembly disposed adjacent to said roof jack and including
• (i) an elongated support member extending under said support frame and between said support blocks of said roof jack and having a plurality of holes defined at locations spaced longitudinally along said support member such that a selected one of said holes at a time is adapted to receive said front attachment key on said rigid bar of said roof jack for holding said roof jack at the rest position on the one inclined surface of the roof and astraddle said support member, said support member further having an upper end adapted to be disposed adjacent to a peak of the roof, and
• (ii) an attachment member mounted to said upper end of said support member and adapted to be secured to an opposite inclined surface of the roof and thereby retain said support member in a stationary position extending upwardly along the one inclined roof surface;
• (c) at least one valley jack including
• (i) a pair of legs rigidly connected together at respective inner ends of said legs to form an apex and diverging away from one another to respective outer ends of said legs,
• (ii) a pair of support blocks each attached to and extending below one of said legs such that said support blocks are adapted to rest on adjacent inclined surfaces of the roof that form a valley therebetween and support said legs such that said legs are spaced above and extend generally parallel to the adjacent inclined surfaces of the roof and converge upwardly toward one another,
• (iii) a pair of hook-shaped elements each attached on and extending upright from said outer end of one of said legs such that said legs support one or more ends of boards thereon and said hook-shaped elements retain the ends of the boards on said legs, and
• (iv) an attachment rod attached to and extending forwardly from said apex formed by said inner ends of said legs;
• and
• (d) at least one valley support assembly disposed adjacent to said valley jack and including
• (i) a valley support member adapted to rest on and extend upwardly along the valley of the roof between the adjacent inclined surfaces thereof and having a plurality of anchor elements spaced apart from one another along and fixed on said valley support member such that a selected one of said anchor elements at a time is adapted to receive an end of said attachment rod of said valley jack for holding said valley jack at the rest position on the adjacent inclined surfaces of the roof and bridging the valley therebetween and at the same elevation on the roof as said roof jack such that an end of the board supported on said roof jack can rest on said valley jack, and
• (ii) an attachment member hingedly attached to and an upper end of said valley support member and adapted to reach over the peak of the roof and be attached to the opposite inclined surface of the roof adjacent to the peak and thereby retain said valley support member in a stationary position extending upwardly along the valley of the roof.

A roof jack for a roof scaffolding system, said roof jack comprising:

• (a) a rigid support frame having a pair of lower ends laterally spaced apart from one another and an upper apex located above and between said lower ends;
• (b) a pair of support blocks each attached to one of said lower ends of said support frame and being adapted to rest on one inclined surface of a roof such that said roof jack is adapted to assume a rest position on the one inclined surface with said support frame thereof spaced above the one inclined surface;
• and
• (c) a rigid bar having an elongated main portion and opposite front and rear end portions, said rigid bar at said rear end portion being rigidly connected to said upper apex of said support frame and formed as a hook-shaped element extending upwardly from said main portion such that said main portion of said rigid bar is adapted to support an elongated board and said hook-shaped element of said rigid bar is adapted to retain the board on said roof jack, said rigid bar at said front end portion being formed as a transverse extending front attachment key.

A valley jack for a roof scaffolding system, said valley jack comprising:

• (a) a pair of legs rigidly connected together at respective inner ends of said legs to form an apex and diverging away from one another to respective outer ends of said legs;
• (b) a pair of support blocks each attached to and extending below one of said legs such that said support blocks are adapted to rest on adjacent inclined surfaces of the roof that form a valley therebetween and support said legs such that said legs are spaced above and extend generally parallel to the adjacent inclined surfaces of the roof and converge upwardly toward one another;
• (c) a pair of hook-shaped elements each attached on and extending upright from said outer end of one of said legs such that said legs support one or more ends of boards thereon and said hook-shaped elements retain the ends of the boards on said legs;
• and
• (d) an attachment rod attached to and extending forwardly from said apex formed by said inner ends of said legs.