Company lists · Data refreshed September 2026

Top 25 Structural steel erection companies based in Türkiye

Name: Structural steel erection companies based in Türkiye
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 403 companies tracked

RevenueBase identified 403 structural steel erection companies headquartered in Türkiye as of September 2026 and tracks 3,117 professional contacts across them, including 185 with verified work emails. Istanbul is the largest hub.

This list covers structural steel erection companies headquartered in Türkiye, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 18, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 18, 2026 86% judged on-target in blind review

403Companies

3,117Contacts tracked

185Verified emails

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The 25 largest structural steel erection companies based in Türkiye

Ranked by team size

Top 25 of 403 structural steel erection companies based in Türkiye, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to structural steel erection companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Gulermak Steel Construction Ind. & Trade Co. INC	Partial evidence	Izmir, TürkiyeHQ checked Sep 18, 2026	501-1,000	91 contacts →
	Partial evidence “GULERMAK Steel Construction Ind.” Source: RevenueBase Database · checked Sep 18, 2026
2	Prizma Endüstri	Indirect evidence	Ankara, TürkiyeHQ checked Sep 18, 2026	201-500	82 contacts →
	Indirect evidence “PRIZMA started operations in Ankara-Turkey in 2001.” Source: RevenueBase Database · checked Sep 18, 2026
3	Atak Engineering	Indirect evidence	Ankara, TürkiyeHQ checked Sep 18, 2026	501-1,000	75 contacts →
	Indirect evidence “Atak Engineering was founded in 1988.” Source: RevenueBase Database · checked Sep 18, 2026
4	Apec Steel Construction	Strong evidence	Istanbul, TürkiyeHQ checked Sep 18, 2026	201-500	47 contacts →
	Strong evidence “APEC Smart Steel Structures is a group of companies operating in the field of engineering, manufacturing, construction and real estate development.” Source: RevenueBase Database · checked Sep 18, 2026
5	Çelikerler Çelik Konstrüksiyon İnşaat San. Tic. Ltd. ŞTI	Indirect evidence	Merkez, TürkiyeHQ checked Sep 18, 2026	51-200	46 contacts →
	Indirect evidence “Bartın Kumluca’da 1844 yılında sıcak demircilik ile iş hayatına başlayan Çelikerler, 2003 yılında şirketleşerek ÇELİKERLER LTD.” Source: RevenueBase Database · checked Sep 18, 2026
6	Rönesans Çelik	Partial evidence	Ankara, TürkiyeHQ checked Sep 18, 2026	201-500	42 contacts →
	Partial evidence “Rönesans Steel Construction Industry & Trade Inc.” Source: RevenueBase Database · checked Sep 18, 2026
7	Polarkon	Partial evidence	Çankaya, TürkiyeHQ checked Sep 18, 2026	51-200	40 contacts →
	Partial evidence “Founded in 1995 and headquartered in Ankara, Turkey, with global offices in Düsseldorf, Germany, and Chicago, Illinois, POLARKON is a leading "design-build" engineering and steel…” Source: RevenueBase Database · checked Sep 18, 2026
8	IS Yapi	Strong evidence	Izmir, TürkiyeHQ checked Sep 18, 2026	51-200	29 contacts →
	Strong evidence “We are specialized in steel structures and fixing systems in all kinds of steel.” Source: RevenueBase Database · checked Sep 18, 2026
9	Setap Steel Construction Solutions	Indirect evidence	34890 Pendik / İstanbul, TürkiyeHQ checked Sep 18, 2026	51-200	29 contacts →
	Indirect evidence “SETAP, with its experienced project team using international standards and its production infrastructure having latest technologies rarely found in Turkey, is offering turn-key…” Source: RevenueBase Database · checked Sep 18, 2026
10	Monosteel	Partial evidence	Sakarya, TürkiyeHQ checked Sep 18, 2026	51-200	28 contacts →
	Partial evidence “Mono Steel is a Turkish manufacturing and construction company established in 2012.” Source: RevenueBase Database · checked Sep 18, 2026
11	Erki̇n Çeli̇k Konstrüksi̇yon	Indirect evidence	Pelitli, TürkiyeHQ checked Sep 18, 2026	51-200	24 contacts →
	Indirect evidence “Erkin Çelik Konstrüksiyon, yapısal çelik imalatı ve montajında mühendislik disiplini, kalite anlayışı ve güçlü üretim altyapısıyla yurt içi ve yurt dışı projelere hizmet…” Source: RevenueBase Database · checked Sep 18, 2026
12	Boypanel Yapı Sistemleri	Indirect evidence	Adana, TürkiyeHQ checked Sep 18, 2026	51-200	23 contacts →
	Indirect evidence “1995 yılında faaliyetlerine başlayan BOYPANEL YAPI SİSTEMLERİ, yüksek oranlarda büyüme sağlayarak, Türkiye de kendi kategorisinde lider olma vizyonuyla, çatı-cephe kaplamaları…” Source: RevenueBase Database · checked Sep 18, 2026
13	Saytekno Building Technologies Group	Strong evidence	Istanbul, TürkiyeHQ checked Sep 18, 2026	11-50	19 contacts →
	Strong evidence “SAYTEKNO is a technological group founded in 1994 and working in the field of design, production and installation of architectural steel, freeform and art glass structures…” Source: RevenueBase Database · checked Sep 18, 2026
14	Ozok Steel	Indirect evidence	Ankara, TürkiyeHQ checked Sep 18, 2026	11-50	19 contacts →
	Indirect evidence “Hafif Çelik Konstrüksiyon * Kişiye Özel Mimari Tasarım * Yenilikçi Çözümler İletişim: 03123958497 0554 537 60 63 0554 537 60 64 0554 537 60 65” Source: RevenueBase Database · checked Sep 18, 2026
15	Yiğitalp Grup	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 18, 2026	51-200	18 contacts →
	Indirect evidence “YİĞİTALP, özellikle endüstriyel binaları anahtar teslim veya alt yüklenicilik şeklinde inşa etmekte, aynı zamanda bu tip binaların her tür çatı ve cephe kaplamaları konusunda…” Source: RevenueBase Database · checked Sep 18, 2026
16	RYS Rota Construction Metal Building Systems	Indirect evidence	Ankara, TürkiyeHQ checked Sep 18, 2026	201-500	14 contacts →
	Indirect evidence “We, who have spent many years as managers in the aluminum sector of construction, especially in the field of external facade covering, have been continuing our activities since…” Source: RevenueBase Database · checked Sep 18, 2026
17	Insteel Çelik VE Prefabrik Yapılar	Indirect evidence	Kocaeli, TürkiyeHQ checked Sep 18, 2026	51-200	14 contacts →
	Indirect evidence “25 yılı aşkın tecrübesiyle, Insteel Çelik ve Prefabrik Yapılar, yüksek kalite standartlarında, özel çözümleri ile kurulduğu günden bu yana, birçok yurtiçi ve yurtdışı projede…” Source: RevenueBase Database · checked Sep 18, 2026
18	KÜNYE	Partial evidence	Şekerpınar, TürkiyeHQ checked Sep 18, 2026	201-500	8 contacts →
	Partial evidence “Since 1986, the knowledge, experience and skill in the project, manufacturing and assembly processes of steel construction building systems, especially industrial facilities…” Source: RevenueBase Database · checked Sep 18, 2026
19	Pentus Construction	Partial evidence	Konya, TürkiyeHQ checked Sep 18, 2026	11-50	6 contacts →
	Partial evidence “Pentus is a building company which is working in business for steel, reinforced concrete and prefabricate sectures.” Source: RevenueBase Database · checked Sep 18, 2026
20	Aşan Çelik Yapı	Indirect evidence	Ankara, TürkiyeHQ checked Sep 18, 2026	11-50	6 contacts →
	Indirect evidence “Sanayi hayatına 2001 yılında ÇELİK YAPILAR ve VİNÇ imalatı ile başlayan AŞAN ÇELİK YAPI LTD.” Source: RevenueBase Database · checked Sep 18, 2026
21	HCR Çeli̇k Maki̇na	Indirect evidence	Bursa, TürkiyeHQ checked Sep 18, 2026	11-50	5 contacts →
	Indirect evidence “Her türlü çelik konstrüksiyon imalat ve montajları Taşıma kasaları, Platform, Merdiven imalat ve montajları, Endüstriyel tesislerin Yangın Tesisatı, Hava Tesisatı ve Su…” Source: RevenueBase Database · checked Sep 18, 2026
22	ERT Endüstri̇ Mühendi̇sli̇k San. VE Ti̇c. AŞ	Indirect evidence	İzmi̇r, TürkiyeHQ checked Sep 18, 2026	51-200	4 contacts →
	Indirect evidence “ERT ENDÜSTRİ MÜHENDİSLİK AŞ, 2021 yılında başta endüstriyel tesisler olmak üzere Endüstriyel İskele Montaj ve Demontajı, İzolasyon İmalat ve Montaj, Kumlama ve Boyama, Boru ve…” Source: RevenueBase Database · checked Sep 18, 2026
23	Özacar İnşaat	Indirect evidence	İzmir, TürkiyeHQ checked Sep 18, 2026	11-50	4 contacts →
	Indirect evidence “Özacar İnşaat Mühendislik San.” Source: RevenueBase Database · checked Sep 18, 2026
24	Yato Yapısal Tasarım Ofisi	Indirect evidence	Çekmeköy, TürkiyeHQ checked Sep 18, 2026	1-10	4 contacts →
	Indirect evidence “YApısal Tasarım Ofisi (YATO) YATO Mühendislik, inşaat mühendisliği ve yapı tasarımı konusunda 15 yılı aşan bir sürede toplanan teknik bilgi ve sürekli artmakta olan deneyimlerle…” Source: RevenueBase Database · checked Sep 18, 2026
25	Tursteel	Indirect evidence	İzmir, TürkiyeHQ checked Sep 18, 2026	11-50	3 contacts →
	Indirect evidence “TURSTEEL Co.” Source: RevenueBase Database · checked Sep 18, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: structural steel erection companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names structural steel erection companies.
Partial evidence: Its own public description names part of structural steel erection companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name structural steel erection companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 403 structural steel erection companies based in Türkiye

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Structural steel erection companies based in Türkiye at a glance

As of Sep 18, 2026

5.9%Verified-email coverage

7.7Average contacts per company

11-50Median size (employees)

14.4%Largest-city concentration · Istanbul

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

103

11-50

151

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Türkiye, so it is reported there. Company counts and contact totals on this page are exact for Türkiye, over 403 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among structural steel erection companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Türkiye whose own description of what they do matches “structural steel erection companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names structural steel erection companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among structural steel erection companies, and records with no verified work email. Companies headquartered outside Türkiye are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 185 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 18, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Structural steel erection companies by metro

Structural steel erection companies in Istanbul58
Structural steel erection companies in Ankara41

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names structural steel erection companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many structural steel erection companies are there based in Türkiye?

RevenueBase identified 403 structural steel erection companies headquartered in Türkiye as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Gulermak Steel Construction Ind. & Trade Co. INC, headquartered in Izmir, tops this list with the largest team on record.

Which city has the most structural steel erection companies?

Istanbul leads with 58 headquartered companies, followed by Ankara (41) and Izmir (23).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 185 verified decision-maker contacts tracked across these 403 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 18, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.