The psakim from rav chama and building security for a courtyard or city

Migu bmokom chazaka,adding on to your neighbors wall,and hezek riyah across the reshus harabim

Does a nikaf pay for walls he’s surrounded by and does a person ever pay early

Bava Ben buta and his advising of king hurdus and where the chazis goes

Learning the mishna as Hezek riyah shma hezek,how we know the size of the different names of bricks, the ama traksin,and not knocking down a shul

Neighbors who want to build a wall and hezek reeah shmei hezek or lo shmei hezek

Habana behfker is it koneh,what your allowed to do when working in reshus harabim and when a plant grows in between an upper and lower garden who does it belong too

Moving downstairs when there’s a whole in the roof,Al hanizak or Al hamzik laharchik and Reb yehuda shita if the guy doesn’t want to build the bottom floor

When somebody wants to build a stronger structure,the machlokes rav and shmuel again about how much damage to a roof when moving in and when somebody wants to pay for work and change his mind on letting the person keep that which he worked on

A proof like Reb Yehuda that chovel braichahim is only 2 issurim and the beginning of perek habayis valiya