big tango alexa
that is additional knowledge

thats right 100mm weld and 300mm is the gap this discussion is very helpful here in Australia the surveyor and city council engineer are very strict, i must to follow what is the instruction in my sketch plan otherwise im going to take down everything if didnt follow thats why this question come out...

thanks to all of you guys
thats right 100mm is the weld and 300mm is the gap

according to the drawing this is 2 purlins 50mmx100size joint to each other

cheers to everyone nice one to discuss and additional to my knowledge as DIYer

thanks weldin mike
thats a very big help
cheers mate

this is quoted in my engineering plan drawing done by architectural draftsmen
coz im doing pergola in my backyard and this required for building permit

says in the plan section of bims and purlins is welded 100 hit & 300 miss
and i dont know about this

hi im very new in welding and DIY only.
Just like to know what is hit and miss
like 100 hit 300 miss

thanks