ravenbear.de

So, I'd like to duplicate ravenbear_us as ravenbear_de. A 7.1.4 studio (I'm actually considering changing this idea to modeling Stefan's MSM-berlin room). The major difference is that in the back of the room, there wil be a futon that can be pulled out into the room and used as a bed or a viewing sofa for movies.

A Thunderbolt screw (often called a Thunderbolt anchor or Thunderbolts masonry anchor) is a heavy-duty, all-metal, self-tapping screw used to fasten items directly into hard building materials like concrete, brick, stone, and blockwork. [1, 2]

Self-tapping threads: When you screw it into a drilled pilot hole, the hardened threads cut into the masonry material.
No expansion stress: Unlike traditional shield anchors, it does not expand or push outward against the hole.
Substrate as a nut: The surrounding concrete or brick acts as the nut for the bolt, creating a tight and secure mechanical lock.

OSB SHEETS

If you're asking because you want to match a U.S. four-by-eight sheet, the European 1250 by 2500 mm sheet is very close, but slightly larger.
Thicknesses typically range from 9 to 25 millimeters.

Bohle und Balken sizes

at hagebau markt, is there a general equivalent to a 2x4 joist?
yes ... 40 x 90 mm Bohle (plank),

at hagebau markt, is there a general equivalent to a 2x10 joist?
yes ... 40 x 240 mm Bohle (plank) or 60 x 240 Balken (beam).

In German hardware stores like Hagebau, "joists" are sold in the Bauholz (construction lumber) aisle. They are categorized under two main terms depending on how they are finished: Kantholz (rough-sawn or rectangular lumber) and KVH (Konstruktionsvollholz, which is premium, finger-jointed, structurally graded C24 timber). 

The most common, standard dimensions you can buy directly off the shelf include the following sizes, measured in millimeters (thickness × width):

Standard Off-the-Shelf Dimensions

Light framing / Small spans

40 × 60 mm 1.5" × 2.3"
60 × 60 mm 2.3" × 2.3"

Medium framing / Studs & joists

60 × 80 mm 2.3" × 3.1"
80 × 80 mm 3.1" × 3.1"

Heavy-duty / Floor & ceiling joists

60 × 120 mm 2.3" × 4.7"
80 × 160 mm 3.1" × 6.3"
100 × 100 mm 3.9" × 3.9"

Key Things to Know Before Going to the Store

• Standard Lengths: Off-the-shelf lumber at German home improvement stores typically comes in fixed lengths of 2.0 meters, 2.5 meters, 3.0 meters, and 4.0 meters.

• Sägerau vs. Gehobelt: Pay attention to the label on the shelf. Sägerau means rough-sawn (slightly fuzzy texture, used for framing hidden behind drywall). Gehobelt or Glatt means planed smooth on all four sides (ready for visible projects). 

• The "C24" Standard: If you are building a structurally critical floor or roof, look specifically for timber stamped with C24 or labeled as KVH. This guarantees the wood has been kiln-dried and sorted to minimize warping, twisting, and large structural knots.

hagebau insulation

Hagebau Markt - Gustrow
Wilfried Hinich - (03843 2870)
https://www.hagebau.de/
https://www.hagebau.de/p/mr-gardener-blockbohlenhaus-karlskrona-anP7000164266/