PDF files (portable document files) were designed just for business people to send large files worldwide over the internet at high speed. That IS the purpose of a PDF file. But you must select WEB use quality.
You will notice when you save the file there are 3 choices. Files for PRINT. High quality. And files for the INTERNET USE Lower quality
(WEB quality) but still look just fine.
Choose the WEB high speed file for internet use.
If you use a ZIP file then not all computer users can view them. Remember some of us use MAC's
The PDF was expressly designed so that ALL computer users can view the document no matter what computer or program they have.
All computers sold come with Acrobat reader to view the Acrobat PDF files.
You do not need to zip a file that is only 38.1KB. But if it was 38.1MB you would need to reduce the file size.
Now about the tables.
The first one 5 feet by 30 inches.
You will not be able to weld the 3/8 plate OR the 1/2 inch plates for the feet with a Miller 140.
If you weld anything to the table top the table top will be WARPED. BAD DESIGN.
The .035 wire does not run well in the Miller 140 . The .024 wire runs better.
The 1/8 thickness wall 2 inch tubing you can weld if the Miller 140 is turned all the way up.
BUT you will not be able to weld the 1/8 thick 2 inch square tubing to the 1/2 inch thick foot plates.
You will only be able to use the Miller 140 for welding the 2 inch tubing to 2 inch tubing if the Miller 140 is turned all the way up.
Here is what I would do.
Make the frame of the table independent of the table top. The table will stay flat if you do not weld it on.
Do-able with the Miller 140 turned all the way up using .024 wire.
Then weld on feet to the bottom legs but you do not need 1/2 thick material.
Just use 1/8 plates because the purpose of the foot is to be in shear and keep the leg from moving on the concrete floor.
Then attach the table top with counter sunk SCREWS drilled and tapped into the 1/8 thick 2 inch square tubing.
The top of the table is 3/8 inch on your drawing. Think about how many people will be required to lift that table top.