Drophead nut for formwork grid systems

A drophead nut for use in a formwork grid system, the drophead nut comprising:

• a rotational nut including:
• a body defining a central circular opening;
• four arms, each of the four arms extending laterally from the body;
• and
• a retention pin gap in a first arm and a second arm of the four arms;
• a top plate;
• a bottom plate;
• a post extending between the top plate and the bottom plate and passing through the central circular opening of the rotational nut;
• a retention pin extending from at least two sides of the post at a midpoint between the top plate and the bottom plate;
• a mid-plate defining a mid-plate central opening and a mid-plate retention pin gap, the mid-plate positioned adjacent to the rotational nut nearer the top plate, the post passing through the mid-plate central opening, and the mid-plate defining a plurality of mid-plate lips, each mid-plate lip associated with a corresponding edge of the mid-plate,
• wherein the retention pin gap of the rotational nut and the mid-plate retention pin gap are each sufficiently sized to, upon alignment of each respective retention pin gap with the retention pin, passage of the rotational nut and the mid-plate past the retention pin, and
• wherein the rotational nut further comprises:
• a first arm and a second arm of the four arms;
• a first impact surface positioned on the first arm;
• and
• a second impact surface positioned on the second arm, and
• wherein:
• the first arm defines a first external radial circumference relative to the central circular opening and has a first lateral extent and a first vertical extent;
• and
• the first impact surface of the first arm is positioned on the first arm at the first external radial circumference of the first arm such that the first impact surface is positioned at an end of the first arm most distal to the central circular opening and the first impact surface has:
• a first impact surface lateral extent extending beyond the first lateral extent of the first arm such that the first impact surface extends beyond the end of the first arm most distal to the central circular opening;
• and
• a first impact surface vertical extent extending below the first vertical extent of the first arm such that the first impact surface extends below the end of the first arm most distal to the central circular opening.

A rotational nut for a drophead nut used in formwork grid systems, the rotational nut comprising:

• a body defining a central circular opening sized to accommodate a drophead post;
• a first arm laterally extending from the body, the first arm having a first lateral extent and a first vertical extent, the first arm defining a first impact surface, the first impact surface positioned on the first laterally extending arm at a first external radial circumference of the first arm most distal to the central circular opening, the first impact surface having:
• a first impact surface lateral extent extending beyond the first lateral extent of the first arm such that the first impact surface is positioned at an end of the first arm most distal to the central circular opening;
• and
• a second impact surface vertical extent extending below the first vertical extent of the first arm such that the first impact surface extends below the end of the first arm most distal to the central circular opening;
• a second arm laterally extending from the body, the second arm having a second lateral extent and a first vertical extent, the second arm defining a second impact surface, the first arm and the second arm defining a retention pin gap of at least 19 millimeters, the retention pin gap sized sufficiently to allow, upon alignment of the retention pin gap with a retention pin of a drophead post, passage of the rotational nut past the retention pin;
• a third arm laterally extending from the body;
• and
• a fourth arm laterally extending from the body.