Welcome to the forum......
I would suggest you think about redesigning your table. The way you have it designed has a name - its called "Committing Spreadsheet"
The current layout is like a spreadsheet - typically short and wide. An Access table is typically tall and narrow.
You have 6 repeating groups. The problem with this design is if the number of "Slabs" changes, you have to completely redesign your dB - the tables, queries, forms, reports and possibly the code.
It looks like the table should have a PK field, 6 fields, plus a field the the slab number.
Here are some links about normalization:
Normalization
Normalization Terms and Concepts
What is Normalization? (there are 5 parts)
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What Is Normalization, Part I: Why Normalization?
Entity-Relationship Diagramming (there are 4 parts)
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Entity-Relationship Diagramming: Part I