# [Java (OpenJDK 8)], 200 bytes

<!-- language-all: lang-java -->

    n->{char[][]s=new char[n][4+2*n];for(int i=0,j=2*n;i<n;s[i][(3+j)/2-i]=47,s[i][2+n+i]=92,s[i][0]=i<1|i>n-2?40:'|',s[i][3+j]=i<1|i>n-2?41:'|',System.out.println("".valueOf(s[i++]).replace('\0',' ')));}

[Try it online!][TIO-j902hqb2]

[Java (OpenJDK 8)]: http://openjdk.java.net/
[TIO-j902hqb2]: https://tio.run/##VZAxT8MwEIX3/AqrS2zSmDRUqiBNGZgYEEPH4MG4bnshOUe2U4Ta/vZg0iLEbe89v5Pvq@VBpqbTWG8@Bmg7Yz2pg8d7Dw3f9qg8GORPBl3faltEUde/N6CIaqRz5EUCkmNEwjgvffB/Xy6f0eudtivSWUC/3oNuNqQkA6aro9pLW4lKuBL1JxkVimqe5Dcoiq2xNDQIlNm0LoNVwBILV4Go6F1Ss9s8BVHOF9PRyhNMgrzPLzITJSxnJ1hhmj/Os4f4FF@C0PwXzcZo/eW8brnpPR@/2SCdTPhBNr1@3dJQTBLBuNVdI5Wm8VsWT2MSM8aK8xBY/Nx95XE9/2BgQ9pAha59WLirBJF259gV0lj448GlUrrzdMGKMT5H52j4Bg "Java (OpenJDK 8) – Try It Online"