Also known as a Batten Hook (by Mutual Hardware at least), an S-shaped piece of strap iron used to temporarily attach a stiffener to a Boardway flat's toggles, in order to straighten a long run of flats.
View attachment 3242
http://www.mutualhardware.com/Theatrical-Set-Hardware/Stage-Hardware/Batten-Hook
See figure 88:
View attachment 3243
Another variety provides for a 1x3 or 1x4 stiffener to be used on edge, making for a much stiffer wall. Loose-pin hinges, alternating top and bottom, are often used instead, but take more time to set-up and strike. This type of hardware is often shop-made rather than purchased, so many variations and names exist.
View attachment 3242
http://www.mutualhardware.com/Theatrical-Set-Hardware/Stage-Hardware/Batten-Hook
See figure 88:
View attachment 3243
Another variety provides for a 1x3 or 1x4 stiffener to be used on edge, making for a much stiffer wall. Loose-pin hinges, alternating top and bottom, are often used instead, but take more time to set-up and strike. This type of hardware is often shop-made rather than purchased, so many variations and names exist.