(under subclass 104) Structure in which the elongated mounting member is formed with passage means having at least one communicating side recess and the flexible-member-retaining device is formed at its end with a correspondingly relatively wide mounting portion receivable through said side recess but too large for entry or escape through any other part of the passage. [figure]
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150, for a cross-slotted track for slidably guiding and selectively locating the end of a brace bar along a freight carrier wall.