Posts for use in fall protection

A horizontal lifeline system comprising:

• at least one post system, comprising:
• an extending post member;
• a first end member operably coupled with a first end of the extending post member, wherein the first end member consists of a first end section, an intermediate section and second end section;
• a second end member operably coupled with a second end of the extending post wherein the second end member consists of a first section and second section;
• wherein the first section of the second end member extends parallel to the second end member, the second section extends at an angle with respect to the first section and positions a lifeline to a first height;
• wherein the first end member is connected to the second end member via a breakable connector, a tensile force of a first threshold magnitude being required between the first end member and the second end member to break the connector, upon breaking of connector, the second section of the second end member bends to lower the height of the lifeline.