Проектировщик проверил несущую стену.

Because it is the direct object of the verb проверил (checked), so it goes into the accusative case.

• Dictionary form: стена
• Accusative singular: стену

This is a very common pattern for feminine nouns ending in -а:

• книга → книгу
• машина → машину
• стена → стену

So проверил стену means checked the wall.

Because it describes стену, and adjectives in Russian must agree with the noun in:

• gender
• number
• case

Since стену is:

• feminine
• singular
• accusative

the adjective must also be feminine singular accusative:

• nominative: несущая стена
• accusative: несущую стену

So the phrase changes together as a unit.

Literally, it comes from the verb нести (to carry, to bear). In construction language, несущая стена means a wall that bears a load—in other words, a load-bearing wall.

So while English says load-bearing, Russian uses a form that is closer to bearing/carrying.

This is a technical adjective often used in architecture and engineering.

Проверил is the perfective past tense form. It presents the action as completed: the designer checked the wall.

Compare:

• проверил = checked, completed the check
• проверял = was checking / checked habitually / checked for some time

In a simple one-time finished event, Russian often prefers the perfective form, so проверил is the natural choice here.

It shows that the verb is in the past tense.

In Russian past tense, verbs also agree with the subject in gender and number:

• проверил = masculine singular
• проверила = feminine singular
• проверило = neuter singular
• проверили = plural

So проектировщик проверил tells you the subject is grammatically masculine singular.

Because it is in the nominative case, which is the usual case for the subject of the sentence.

Here is the basic structure:

• Проектировщик = subject (the designer/design engineer)
• проверил = verb (checked)
• несущую стену = direct object (the load-bearing wall)

Russian often relies on case endings more than English does. Even if the word order changes, the cases still show who did what to whom.

Not always. In everyday English, designer can sound broad, but проектировщик is often more technical.

Depending on context, it can mean something like:

• designer
• design engineer
• planner
• project engineer

In construction or engineering contexts, design engineer or project designer is often closer than the very general English word designer.

So the exact translation depends on the field.

Yes. Russian word order is more flexible than English because case endings do much of the grammatical work.

The neutral order here is:

• Проектировщик проверил несущую стену.

But you could also say:

• Несущую стену проверил проектировщик.
• Проверил проектировщик несущую стену.

These variants may shift the focus or emphasis, but the basic meaning remains the same because:

• проектировщик is still the subject
• стену is still the object

English usually cannot do this as freely.

Russian has no articles.

So Проектировщик проверил несущую стену could mean:

• The designer checked the load-bearing wall
• A designer checked a load-bearing wall

Which one sounds best depends on context. Russian leaves that information unstated unless it is important and expressed another way.

This is very normal and one of the biggest differences from English.

The stress is:

• проектиро́вщик
• провери́л
• несу́щую
• сте́ну

A rough English-style pronunciation guide:

• pra-yee-ktee-ROV-shchik
• pra-vye-REEL
• nye-SOO-shchu-yu
• STYE-nu

A few helpful notes:

• щ is a soft long sh-like sound
• unstressed о is often pronounced more like a
• Russian stress is important and can move unpredictably, so it is worth memorizing with the word

Yes. Несущая стена is a very common and standard expression in Russian for load-bearing wall.

You should learn it as a phrase:

• nominative: несущая стена
• accusative: несущую стену

This is often easier than trying to build it from scratch each time, especially because несущая comes from a participle-like form that may feel unfamiliar at first.