A post foundation system is provided. The system has a shaft with a helical disk attached to one end and a post support attached to the other end. The helical disk drives the shaft into the ground as a rotational force is applied to the shaft. A fin section is rotatably coupled about the shaft between its first and second ends. The fin section can have one or more fins extending outwardly from the shaft. The fin section engages the ground to stabilize the post foundation system as the shaft of the post foundation system is driven into the ground.

A bollard assembly is formed from a bollard that resides in a tubular socket. The socket has an internal core that is separated from the tube walls by annular recess. The lower end of the bollard is received within the recess. Lifting elements inside the bollard engage the upper surface of the core, and are internally biased in favor of extension. A locking system prevents extension of the lifting elements. When the locking system is unlocked, the pressure of the lifting elements against the core causes the bollard to rise out of and slightly above the socket, without external assistance. Once raised, the bollard may easily be removed from the site of the socket.

A bollard assembly is formed from a bollard that resides in a tubular socket. The socket has an internal core that is separated from the tube walls by annular recess. The lower end of the bollard is received within the recess. Lifting elements inside the bollard engage the upper surface of the core, and are internally biased in favor of extension. A locking system prevents extension of the lifting elements. When the locking system is unlocked, the pressure of the lifting elements against the core causes the bollard to rise out of and slightly above the socket, without external assistance. Once raised, the bollard may easily be removed from the site of the socket.

A bollard sleeve with a removable or replaceable cover is described. In one example, the bollard sleeve includes a cover portion and a sleeve portion coupled to the cover portion. The cover portion can have a cover removably coupled to a skirt, and the sleeve portion can have a tab. When the tab is in a first position, the tab can prevent the cover from being removed. When the tab is in a second position, the tab can form an opening that allows the cover to be removed. The tab can be bent from the first position to the second position, or the tab can be removed from the sleeve portion.

A bollard sleeve with a removable or replaceable cover is described. In one example, the bollard sleeve includes a cover portion and a sleeve portion coupled to the cover portion. The cover portion can have a cover removably coupled to a skirt, and the sleeve portion can have a tab. When the tab is in a first position, the tab can prevent the cover from being removed. When the tab is in a second position, the tab can form an opening that allows the cover to be removed. The tab can be bent from the first position to the second position, or the tab can be removed from the sleeve portion.

A post mounting apparatus for removably securing the lower end of a post in the ground. The post mounting apparatus comprises a base plate with an upwardly facing socket sized to receive the lower end of the post, the base plate and socket being buried in the ground with an upper end of the socket exposed above ground to receive the post. A cross-piece traversing the interior of the socket and spaced above the lower end of the socket supports the bottom of the post above the bottom of the socket. Internal vertical splines formed on the socket inner wall above the cross-piece engage the lower portion of the post with a snug but easily-removable fit.

A post mounting apparatus for removably securing the lower end of a post in the ground. The post mounting apparatus comprises a base plate with an upwardly facing socket sized to receive the lower end of the post, the base plate and socket being buried in the ground with an upper end of the socket exposed above ground to receive the post. A cross-piece traversing the interior of the socket and spaced above the lower end of the socket supports the bottom of the post above the bottom of the socket. Internal vertical splines formed on the socket inner wall above the cross-piece engage the lower portion of the post with a snug but easily-removable fit.

The present invention provides an anchor pile and installation method for the same, which includes insertion hole portions and guide portions formed in the side surface of a hollow pipe. In a state where a resistance member formed of a material that can be elastically deformed is stored within the pipe, the anchor pile is driven into the ground. When an auxiliary tool is used to pull up the resistance member in a vertical direction within the pipe after the anchor pile is driven into the ground, the protrusion portions of the resistance member slide on the guide portions and are deformed so as to be opened and extended toward the insertion hole portions. The protrusion portions of the resistance member are protruded from the insertion hole portions toward the ground and function to provide the resistance force of the anchor pile in the ground.

The present invention provides an anchor pile and installation method for the same, which includes insertion hole portions and guide portions formed in the side surface of a hollow pipe. In a state where a resistance member formed of a material that can be elastically deformed is stored within the pipe, the anchor pile is driven into the ground. When an auxiliary tool is used to pull up the resistance member in a vertical direction within the pipe after the anchor pile is driven into the ground, the protrusion portions of the resistance member slide on the guide portions and are deformed so as to be opened and extended toward the insertion hole portions. The protrusion portions of the resistance member are protruded from the insertion hole portions toward the ground and function to provide the resistance force of the anchor pile in the ground.

There is disclosed a pole support for removably supporting a hollow tubular pole, wherein the pole has a latching recess provided along its length. The pole support includes a housing defining a socket that is open at its operative upper end for receiving the pole. A latch is located within the socket and is mounted on a pivot to be pivotally movable between a latched position and an unlatched position. The latch has a latching arm extending on one side of the pivot and a ballast arm extending on an opposed side of the pivot, wherein a centre-of-weight of the latch is located off-centre from the pivot in the ballast arm so that ballast arm normally biases latch under gravity into its latched position.