No fence or portion of a fence shall be constructed within the front setback area of a building in a residentially zoned district, except as follows:

Other than an allowable decorative fence, a fence may be constructed along an interior lot property line, not to extend into the front setback area.

No fence or segment of a fence shall be constructed nearer than four feet of any property line adjacent to an alley.

No fence or segment of a fence shall be constructed nearer than four feet of any rear property line, except that in I-1 Light Industrial and I-2 Heavy Industrial Districts owners may have a fence constructed on any property line, provided that no fence in the front setback obstructs vision to an extent greater than 50%.

Unless otherwise provided herein, no fence shall be constructed with any point higher than six feet above ground level; provided, however, that fences in light and heavy industrial zoned areas shall not be higher than eight feet above ground level, excluding devices for holding barbed wire.

No fence shall be constructed which is a picket fence or which is of an otherwise dangerous condition, or which conducts electricity or is designed to electrically shock, or which uses barbed wire; provided, however, that barbed wire may be used in light and heavy industrial zoned areas if the devices securing the barbed wire to the fence are eight feet above the ground and project toward the fenced property and away from any public area.

Vision triangle. On a corner lot no fence, hedges and vegetation shall be allowed in the setback area of a corner lot at the intersection of any two streets and the intersection of the adjacent side street and rear alley property line as described. See § 465-318, General definitions, "vision clearance" and "vision triangle."

Any fence necessary at any school, public park or other public recreational facility to accommodate recreational activities shall be exempt from the maximum height requirements of this section.

In B-3 Highway Business Districts only, a fence not to exceed 14 feet in height shall be allowed in the rear setback for the purpose of outside storage for home improvement merchandise stores.

Two foot set back from any sidewalk.

Fencing shall be a minimum of four feet above the top of the ground, and the fence and/or surrounding structures shall enclose the entire pool area; fence gates protecting pools shall be automatically closed and locked upon release. Gates shall not be capable of opening from the outside and shall be secured to prevent entry when the pool is not in use. Fence material shall be a cyclone-type fence, vertical slats, or other members built to prevent the through passage of a sphere with a diameter of three inches or larger and the maximum distance from the underside of the fence to grade and to discourage or impede climbing; all areas adjacent or near the fence shall be cleared of material which might be used for climbing purposes; or

Barriers of metal, wood, hard plastic, canvas, tarp or other durable material designed and employed to prevent use of, or entry into, the pool (rather than to control heat loss or keep out dirt or insects) shall be acceptable guarding for a pool if the same can be secured (including but not limited to, tie-down/stake down of a tarp covering said swimming pool when not in use) to prevent such entry or use; or

Pools which have an aboveground deck which surrounds all the pool and which deck, alone or with walls, is a minimum of four feet above the pool water level, and which has sides to impede climbing, shall also be a sufficient pool guard.

Fences erected to warn of construction hazards, or for similar purposes, shall be clearly visible or marked with colored streamers or other such warning devices at four-foot intervals. Such fences shall comply with all setback requirements. The issuance of a permit shall not be necessary for temporary fences as described herein, but said fences shall not be erected for more than 45 days.

In cases of national emergency and/or increased security threat level to a parcel of property, the Common Council shall have, upon request of the owner or tenant, the discretion to extend said 45-day time limit for such time as the Common Council deems appropriate.