Plaintiff Lennox Industries, Inc. (Len-nox), brought this equity action to establish its claim under chapter 573, The Code 1979, for materials furnished ABC Supply Co. (ABC), which it alleged was a subcontractor on a public improvement project. Trial court, finding that ABC was a materialman and not a subcontractor, held Lennox could not recover. We reverse and remand.
In December 1977 the City of Davenport took bids to remodel a police station. Shir-Jim, Inc., d/b/a Northwest Plumbing & Heating Co., was the successful bidder for the mechanical work. It entered into a contract with the city to provide and install the plumbing and heating and cooling equipment for the sum of $144,500. Defendant Insurance Company of North America (INA) provided a performance bond as required by sections 573.2 — .5, The Code.
The job specifications required Lennox heating and cooling units. Shir-Jim could have obtained the equipment directly from Lennox. However, in order to comply with federal regulations requiring participation by minority contractors, it ordered the Len-nox equipment from ABC of Topeka, Kansas. ABC ordered the equipment from Len-nox. The latter company sent it directly to Schebler & Co. in Davenport. Shir-Jim had contracted with Schebler to install this equipment. Aside from two telephone conversations, minimal correspondence, and a minor revision in the purchase order contract, ABC had little contact with Shir-Jim on the police station project. The equipment units ordered from Lennox were not “standard” and were in stock only “sometimes.”
Shir-Jim paid ABC for these units in one payment of $22,875. ABC did not pay Len-nox. Lennox sued ABC in Kansas, obtained a judgment for $22,814.50 with interest and costs, but collected only $300. Lennox then brought this suit against Davenport, Shir-Jim, Schebler, ABC, and INA to establish its claim against the $14,450 contract retainage held by the city, and against INA on its bond. Schebler was dismissed as a party defendant. ABC did not appear.
I. The parties agree the fighting issue in this case is whether ABC was a “subcontractor” as that word appears in section 573.7, The Code:
Any person, firm, or corporation who has, under a contract with the principal contractor or with subcontractors, performed labor, or furnished material . . . in the construction of a public improvement, may file, with the officer, board, or commission authorized by law to let contracts for such improvement, an itemized, sworn, written statement of the claim for such labor, or material
(Emphasis added.) No one contends Len-nox did not meet all filing requirements. Thus, if ABC was a section 573.7 “subcontractor,” Lennox has a claim against the retainage, Shir-Jim and INA for payment *577 for its equipment, and attorney fees. See §§ 573.18 — .22, The Code.
II. Lennox argues that because chapter 573 does not define “subcontractor” we should adopt the definition in subsection 572.1(2), The Code. Although section 573.1 (“Terms defined”) has been amended since the broad subsection 572.1(2) definition has been in effect, the legislature has not seen fit to adopt that definition, or any other definition, for “subcontractor.” While this court extensively analyzed the concepts of “subcontractor” and “materialman” in
Forsberg v. Koss Construction Co.,
III. In our two most recent chapter 573 cases,
Dobbs v. Knudson, Inc.,
We distill from the federal decisions not a technical, but a functional definition. A subcontractor is an entity that performs for and takes from the prime contractor a specific part of the labor or material requirements of the original contract. The sub-stantiality and importance of the entity’s relationship with the prime contractor is critical. The substantiality of the relationship will usually determine whether the prime contractor can protect itself, since it easily can require bond security or other protection from those few “subcontractors” with whom a substantial relationship exists.
See J. W. Bateson Co. v. United States ex rel. Board of Trustees,
It is apparent under the language of the Miller Act and section 573.7, The Code, that ordinarily a contract with a prime contractor is a prerequisite to being a subcontractor.
Bateson,
Although the issue is close, we hold ABC was a subcontractor within the meaning and intent of section 573.7, The Code. It had a contract with the prime mechanical contractor to furnish cooling and heating units that were an integral part of the project plans and specifications. The cost of these units comprised about fifteen percent of Shir-Jim’s total compensation under its contract with Davenport. Applying the above functional test, ABC therefore undertook to furnish a specific part of the materi *578 als required under the original contract. Contrary to inferences in Shir-Jim’s brief, ABC, under the functional test we adopt, was not required to furnish labor or install the material in order to be a section 573.7 “subcontractor.” “Material,” as defined in subsection 573.1(4), may even include gasoline and fuel, items not ordinarily requiring labor or installation.
Nor is Lennox prohibited from recovering because it did not install the units it manufactured. Other requirements being met, section 573.7 permits recovery by a sub-subcontractor furnishing “labor, or material” to a subcontractor.
IV. A number of this court’s decisions relied on by Shir-Jim are from an era when the predecessors of chapter 573 were strictly construed.
See, e.g., Melcher Lumber Co. v. Robertson Co.,
We have examined the other arguments advanced by the defendants but do not find them controlling.
We reverse and remand for further proceedings in conformance with this opinion.
REVERSED AND REMANDED.
