Balcony Guardrail, a decorative and protective feature for the outer edge of a balcony, is typically made from welded or assembled alloy pipe materials. Commonly, the low window sill is about 0.5 meters from the ground. To meet safety standards, adding a guardrail or fence that is 0.4 meters from the interior wall would suffice. In cases where the window sill is excessively large, such as in bay windows, where children often stand to gaze out and users must step onto the sill to open windows, the guardrail attached to the sill should reach a height of 0.9 meters.