Earnest M. Gray brought this action for injuries which he sustained when he was struck by the boom of a construction crane manufactured by defendant, The Manitowoc Company, Inc. (Manitowoc). Gray’s wife, Hughlene Gray, joined in this action seeking damages for loss of consortium and companionship. The Grays sought recovery under Mississippi law on theories of strict liability, implied warranty and negligence asserting that Gray’s injuries were caused by a defect in the design of the crane and that Manitowoc had provided inadequate warnings of this defect. After the jury returned a verdict for the Grays, Manitowoc moved for judgment notwithstanding the verdict and for a new trial, asserting that the Grays failed to establish either the existence of a defect or a breach of a duty to warn. The district court denied Manitowoc’s motion and entered judgment for the Grays. We conclude that the evidence was insufficient to establish that the crane possessed a latent hazard, as required by Mississippi law, for recovery on any of the theories of liability presented by the Grays and, therefore, reverse.
I.
Gray was struck in two separate incidents by the butt end of the boom of a Manitowoc 4100W crane while working as an ironworker foreman on a construction project near Port Gibson, Mississippi. These incidents occurred while Gray’s crew was changing sections of the crane’s boom and had placed the boom in a plane roughly parallel to the ground (the “boom down” position). Gray was standing on the left side of the crane, supervising this operation, as the crane operator swung the lowered boom in Gray’s direction, striking Gray in the back.
Testimony at trial established that the operator’s vision to the left side of the Manitowoc crane is obscured by the boom when the crane is operated in the “boom down” position. To compensate for the operator’s incomplete field of vision, users of cranes such as the 4100W place a signalman at various locations on the ground to guide the operator. This procedure was followed by Gray’s employer during both incidents in which Gray alleged that he was struck. Gray contends, however, that Manitowoc should have provided mirrors, closed circuit television cameras or other devices to enable the operator to see to the left side of the crane when the crane is operated in the “boom down” position. Gray asserts that had these safety devices been placed on the crane, the crane operator would have seen Gray standing on the left side of the boom and would have avoided hitting him with the boom.
Manitowoc responds that even if mirrors or other devices would have permitted the operator to observe the area on the left side of the crane, the omission of these devices did not render the crane defective. *868 Manitowoc argues that the hazards of operating the crane in the boom down position were open and obvious to ordinary users of the crane and that Mississippi law does not permit recovery under any theory of products liability for a manufacturer’s failure to correct such patent dangers.
II.
Mississippi courts first spoke to the issue of patent product design hazards in
Harrist v. Spencer-Harris Tool Co.,
Assuming, arguendo, (but not deciding the point at this time), this Court may ultimately adopt the so-called modern concept that a person who has no contractual relations with a manufacturer may recover for injuries caused by negligence of the manufacturer, nevertheless, in this case, we would be required to affirm the trial court because the alleged defects are not considered to be latent or concealed. If we assume there were defects, we think they were apparent and obvious to a casual observer.
Id.
We applied the reasoning of
Harrist
to a claim of negligent design in
Ward v. Hobart Manufacturing Co.,
The court in Harrist followed what appears to be the general rule in negligent design cases: where the alleged danger is open and obvious and the manufacturer has done everything necessary to insure that the machine will function properly for its designed purpose any duty owed to a future user has been fulfilled, (footnote omitted).
Id., at 1180.
In
Jones v. Babst,
III.
Under Mississippi’s version of strict liability for hazardous products, man
*869
ufacturers are not insurers of the products they produce; the existence of a product defect must be established before recovery may be obtained for a resulting injury.
Walton v. Chrysler Motor Corp., 229
So.2d 568, 572 (Miss.1969);
General Motors Corp. v. Howard,
Comment (g) to the Restatement § 402A defines the term “defective condition”: “The rule stated in this Section applies only where the product is, at the time it leaves the seller’s hands, in a condition not contemplated by the ultimate consumer, which will be unreasonably dangerous to him.” Comment (i), in turn, gives substance to the phrase “unreasonably dangerous”:
The rule stated in this Section applies only where the defective condition of the product makes it unreasonably dangerous to the user or consumer____ The article sold must be dangerous to an extent beyond that which would be contemplated by the ordinary consumer who purchases it, with the ordinary knowledge common to the community as to its characteristics.
As these comments illustrate, the consumer expectation test of section 402A is rooted in the warranty remedies of contract law, and requires that harm and liability flow from a product characteristic that frustrates consumer expectations. See Keeton, Product Liability and the Meaning of Defect, 5 St. Mary’s L.J. 30, 37 (1973).
In the seminal Mississippi case for strict liability for defective products,
State Stove,
*870
We recognize that excluding patent hazards from the definition of a product design defect has been subject to much scholarly criticism,
3
and has been rejected in a number of jurisdictions.
4
Nonetheless, the patent danger bar was, until recent years, generally thought to be the prevailing rule in the various states
3
and, in the face of scholarly criticism, has been reaffirmed in a number of jurisdictions.
5
6
In the absence of any sign that this rule has been, or would be, rejected by the Mississippi Supreme Court, we are bound to apply it in this case.
See Wansor v. George Hantscho Co., Inc.,
IV.
We are persuaded that the record does not support a finding that the blind spot in the 4100W was a latent hazard. 7 The evidence was overwhelming that the existence of this blind spot was common knowledge in the construction industry. Gray’s supervisor, testifying as Gray’s witness, stated that the existence of a blind spot in the crane operator’s field of vision had been widely discussed at the Grand Gulf job site. The business manager of Gray’s union local, again testifying as Gray’s witness, indicated that the left side of the 4100W crane was referred to as the “blind side”. Indeed, the photographs and physical evidence introduced at trial plainly reveal that if a workman standing in the blind spot on the left side of the 4100W had attempted to look at the crane operator, he would have been unable to see him; the record suggests no reason why, in this circumstance, the workman should expect that the crane operator would be able to see him. Finally, uncontested evidence concerning the universal industry practice of using a signalman on the ground to guide operators of cranes clearly demonstrated a common awareness in the construction industry of both the limitation on the operator’s field of vision inherent in the design of such cranes and the dangers posed by this limitation. Plaintiff adduced no evidence that manufacturers of other cranes of the vintage of the 4100W equipped them with mirrors, television cameras or other similar devices. Rather, the evidence showed that there was no *871 such industry custom of providing such devices. Industry custom therefore could not serve as a basis for a consumer to expect a crane manufacturer to furnish such devices.
Balanced against this evidence favorable to Manitowoc was Gray’s testimony that he did not learn of the blind spot until after his second accident and the testimony of one inexperienced co-worker of Gray’s that he also was unaware of the blindspot. Under the
Boeing
standard, we must, of course, credit this testimony. Nonetheless, both the Restatement’s theory of strict liability and Mississippi’s theories of negligence and implied warranty require an objective appraisal of the obviousness of a product hazard.
8
See Restatement,
§ 402A, comment (i) (the product “must be dangerous to an extent beyond that which would be contemplated by the ordinary consumer who purchases it, with the ordinary knowledge common to the community as to its characteristics”);
Harrist,
Since the Grays failed to establish that the Manitowoc 4100W crane was defectively designed under any proper theory of Mississippi law, 9 the district court erred in refusing to grant defendant’s motion for judgment notwithstanding the verdict. We therefore
REVERSE and RENDER the judgment.
Notes
. Although there is equivocal language in Ward to suggest that the obviousness of the danger is only one factor in determining the reasonableness of the design, considering the unequivocal language by the Mississippi Supreme Court in Harrist and Jones, we are persuaded the Mississippi Supreme Court would follow the clear language in its own cases.
. Dean Prosser expanded on the language quoted above. He explained that the existence of a requirement that a hazard disappoint the expectations of the ordinary consumer "is borne out by the cases of conditions ‘natural’ to food, such as a fish bone in a plate of chowder, or a cherry pit in cherry pie, which the ordinary consumer would expect to encounter, and against which he would normally take his own precautions.” Prosser, Section 99 at 660. Dean Prosser continued in a footnote: "It is not the fact that the defect is a natural one which is important, but the fact that the ordinary consumer would expect that he might encounter it.” Id. at 660 n. 76.
. See, e.g., Darling, The Patent Danger Rule: An Analysis and A Survey of its Vitality, 29 Mercer L.Rev. 583 (1978); Marschall, An Obvious Wrong Does Not Make a Right: Manufacturers' Liability for Patently Dangerous Products, 48 N.Y.U.L.Rev. 1065 (1973); P. Keeton, Prosser and Keeton on The Law of Torts, § 99 at 698-99 (5th ed. 1984).
. See e.g.
Knitz v. Minster Machine Co.,
. 1 R. Hursh & H. Bailey, American Law of Products Liability 2d, § 412 at 671, § 414 at 678 (2nd ed. 1974); Sherman, Products Liability For the General Practitioner, § 7:15 at 219 (1981). Cf. P. Sherman, Products Liability For the General Practitioner, § 7:15 at 58 (Supp.1984); Darling, The Patent Danger Rule: An Analysis and A Survey of its Vitality, 29 Mercer L.Rev. 583, 604-09 (1978).
.
See, e.g., Delvaux v. Ford Motor Co.,
. We review the district court’s denial of Manitowoc’s motion for judgment notwithstanding the verdict or a new trial under the familiar standard adopted in
Boeing Co. v. Shipman,
. Gray’s actual ignorance or awareness of the crane’s blind spot hazard would be dispositive only if an assumption of risk issue were before us.
See Alexander v. Conveyors & Dumpers, Inc.,
. With respect to the verdict on theories of negligence and implied warranty, no serious contention is made that Manitowoc might be liable on the ground that the 4100W crane did not function properly for its intended purpose. Like the meatgrinder which adequately ground meat in
Ward,
it is not disputed that this crane adequately performed the construction tasks for which it was designed. See
Ward,
