Formwork with height adjustable support for forming concrete surfaces that transition between upward sloping and downward sloping

A formwork system for supporting one or more forming panels to form a horizontal concrete surface, said system comprising:

• a height-adjustable support comprising a central upstanding member providing a vertical abutment surface and a support arm having an inclined portion extending up and away from said central upstanding member;
• a beam comprising a transverse bar proximate an end, said transverse bar supported by said inclined portion of said support arm so that said transverse bar moves laterally relative to said inclined portion as said support arm is moved vertically;
• and
• a foot extending from said end of said beam and abutting said vertical abutment surface, wherein said vertical abutment surface opposes lateral movement of said beam relative to said upstanding member;
• wherein an increase in the height of said support causes said transverse bar to move towards said central upstanding member along said inclined portion.