How to do the outdoor guardrail of the owner's external wall according to the window attribute?

The property has the right to prevent the owner from installing. Property can be in accordance with Article 6 of the Measures for the Administration of Interior Decoration of Residential Buildings. Without approval, the decorator engaged in interior decoration of residential buildings shall not carry out the following acts: (1) erection of buildings and structures; (two) to change the facade of the house and open the doors and windows on the non-load-bearing external wall; (3) Dismantling heating pipelines and facilities; (four) the demolition of gas pipelines and facilities. The property has the right to prevent the owner from installing. The acts listed in items (1) and (2) of this article shall be approved by the competent department of city planning administration; The third behavior shall be approved by the heating management unit; Article 4 The act shall be approved by the gas business unit.