If branch lines are going north to south with a head spacing of 14 feet, how far can the head be located from the south wall?

In fire sprinkler systems, proper spacing and placement of sprinkler heads are crucial for effective coverage and compliance with safety standards. The spacing of sprinkler heads is typically determined by the layout of the branch lines and the distance from walls or other obstructions.

In this scenario, with the branch lines oriented north to south and the head spacing set at 14 feet, the positioning of the sprinkler heads must take into account the distance from the wall. To ensure effective coverage and adhere to codes, the sprinkler heads should ideally be placed such that they maintain a balanced distance from the nearest wall.

By calculating the distance from the branch line to the wall while considering the head spacing, we find that if the sprinkler head spacing is 14 feet, the southernmost head can be placed with a minimum distance of about half the spacing (7 feet) to the south wall. This setup allows for maximum coverage while still being compliant with necessary guidelines.

Thus, the sprinkler head can be effectively placed 7 feet from the south wall, which corresponds to the correct answer.