Combination hold-down clamp and expansion guide apparatus for cable trays

A hold-down apparatus (10) for holding an associated cable tray on an associated support rod member, the cable tray being of the type having a pair of generally parallel rails with flanges extending lengthwise of the rails and being adapted to bear on the support rod member with the flanges defining an elongate bead portion extending lengthwise of the flanges, the hold-down apparatus comprising:

• a main body portion (100) comprising a central aperture (114) defining a substantially cylindrical opening (116) extending in a direction substantially transverse planes defined by top and bottom surfaces (110, 112) of the main body portion (100) completely through a central body portion (106) of the main body portion (100) between the top and bottom surfaces (110, 112);
• a fixed clamp portion (104) carried by the main body portion (100), the fixed clamp portion (104) having a generally downwardly directed U-shaped configuration and being configured when positioned in a first orientation relative to the associated cable tray to selectively tightly engage and tightly hold the associated bead and flange of the associated cable tray relative to the associated support rod member;
• an expansion clamp portion (102) carried by the main body portion (100), the expansion clamp portion (102) having a generally downwardly directed U-shaped configuration and being configured when positioned in a second orientation relative to the associated cable tray to selectively loosely engage and slidably hold the associated bead of the associated cable tray relative to the associated support rod member;
• first indicia (330) carried on a side of the main body portion (100) opposite from the fixed clamp portion (104), the first indicia (330) being distinguishable from the main body portion (100) for indicating an orientation of the fixed clamp portion (104) relative to the associated cable tray;
• second indicia (332) carried on a side of the main body portion (100) opposite from the expansion clamp portion (102), the second indicia (332) being distinguishable from the main body portion (100) for indicating an orientation of the expansion clamp portion (102) relative to the associated cable tray;
• and,
• a fastener 362 extending in the central aperture (114), the fastener 362 being selectively matable with the associated support rod member and configured to draw the main body portion (100) relative to the associated support rod member for i) tightly clamping the associated cable tray relative to the associated support rod member when the main body portion (100) is in the first orientation relative to the associated cable tray, and ii) slidably holding the associated bead relative to the associated support rod member when the main body portion (100) is in the second orientation relative to the associated cable tray.