In December 1990, Maxie Ann Spearman allegedly slipped and fell in a liquid substance while she was walking between parked vehicles in a parking garage owned by the Georgia Building Author *802 ity (GBA). She filed this action against GBA alleging that she suffered injuries as a result of GBA’s negligence. The case was tried to a jury, which found in favor of GBA. Spearman appeals, enumerating as error the trial court’s charge concerning expert testimony and also the admission of an alleged prior inconsistent statement. We conclude that the court’s charge was correct and that admission of the statement was not error, and we affirm.
1. Spearman first complains that the trial court erroneously failed to instruct the jury on the significance of privately published industry standards referred to by expert witnesses. Spearman’s requested charge states: “Expert testimony regarding the standard of care is not limited to what may be based upon a published rule or regulation. You may consider expert testimony on this point whenever the witness is shown to be qualified, even if other experts disagree. Expert testimony may incorporate reference to statutes, ordinances, regulations and privately set guidelines, and such may be considered as illustrative of ordinary negligence. However, it is not necessary for there to be a specific violation of a written code or standard in order for there to be a failure to exercise ordinary care.”
At trial, expert testimony was in conflict concerning measurement of the coefficient of friction required for safe walking surfaces. Spearman’s expert, John Templer, testified that .5 is accepted as a safe coefficient of friction for a concrete walking surface, regardless of whether the surface is wet or dry. On cross-examination, when asked whether a written standard exists for the coefficient of friction on a wet surface, Templer stated that he would “hedge” his reply. He admitted that the national standard for measuring the coefficient of friction is that of the American Society for Testing and Materials (ASTM) and that the ASTM standard “doesn’t talk about wet or dry.” On the other hand, he also testified, without citing to a specific standard, that ASTM standards do exist for testing wet surfaces in a bathtub.
Four years after Spearman fell, Templer measured the coefficient of friction in the parking garage. He tested two “spots” on the concrete floor in the general area of Spearman’s fall. He performed “dry” and “wet” tests of those two areas. When he took measurements on the dry concrete floor at those two spots, Templer found the coefficient of friction to be greater than .5, a measure he considered satisfactory. Upon performing tests on wet concrete, Templer found the coefficient of friction to be greater than .5 at the first spot but between .23 and .28 at the second spot, which was “extremely slick” in his opinion. He performed similar tests on other walking surfaces of the garage and found the coefficient of friction to be less than .5 when tested both dry and wet. He found other “extremely slick” areas in the garage and described them as being comparable to the slick *803 ness of glass.
GBA’s expert, Daniel Sheehan, testified that he too measured the coefficient of friction of the concrete floor in the general area where Spearman fell. Unlike Templer, who testified that a coefficient of friction of .5 whether measured dry or wet is accepted as a safe coefficient of friction, Sheehan testified that the “industry accepted standard is a static coefficient of friction of .5 on a walkway surface tested in a dry condition.” (Emphasis supplied.) He testified that no standard exists for performing a wet test on a walkway surface. He did admit that the machine he- used to measure the surface could yield higher results than the machine used by Templer. Sheehan took several measurements on dry concrete and found no readings below .5.
Spearman maintains that a cautionary jury instruction regarding both “offensive” and “defensive” use of privately published standards is important to protect plaintiffs and defendants from potential abuses of privately promulgated industry standards. She argues that such an instruction “is necessary to avoid having jurors misled into believing that violation of one party’s interpretation of a privately promulgated industry standard constitutes negligence as a matter of law, or on the other hand, misled into believing that compliance with another party’s interpretation of such a private standard bars tort recovery.”
The trial court did not err in refusing to give the requested instruction. Among other requirements, a charge must be adjusted to the evidence and “embody a correct, applicable and complete statement of law, legal and perfect in form.” (Citations and punctuation omitted.)
Shilliday v. Dunaway,
In addition, it is incumbent on one alleging error to show that
*804
the error is harmful. See generally
Thompson v. Hardy Chevrolet &c.,
The charge as a whole adequately instructed the jury on the role of expert witnesses. In addition to charging on weight of the evidence, credibility, and impeachment, the court charged in relevant part: “The law permits expert witnesses to give their opinions based upon their training and their experience. You are not required to accept the testimony of any witness, expert or otherwise. Testimony of an expert, like that of all witnesses, is to be given only such weight and credit as you think it’s properly entitled to receive.” (Emphasis supplied.) This charge authorized the jury to accept or reject any portion of any expert’s testimony, which included testimony regarding the ASTM standards. Consequently, there can be no serious contention that the jury suffered from a misconception that compliance with ASTM standards negated liability.
2. Spearman also contends that the trial court erroneously admitted testimony of an alleged inconsistent prior statement by her expert witness. According to Spearman, a proper foundation was not laid, in violation of OCGA § 24-9-83.
During redirect examination of GBA’s expert, Sheehan, GBA elicited testimony that Sheehan had reviewed articles co-authored by Templer. Sheehan was specifically asked, “In those articles, did Dr. Templer himself say there was [sic] no wet test standards?” Spear-man objected to this question, contending that GBA did not question Templer about his articles during cross-examination the day before. The trial court overruled the objection, and Sheehan testified that Templer’s article addressed the lack of clarity of testing standards. More importantly, he testified that the publication addressed the *805 “wide variations in wet testing results in trying to recreate them” and that it specifically stated that walkway surfaces are tested in a dry condition.
Spearman contends that GBA failed to lay a foundation prior to using contradictory statements to impeach Templer’s testimony. Even assuming this to be so, we find no reversible error. The complained-of line of questioning was elicited by Spearman. Before GBA questioned Sheehan on redirect concerning Templer’s publication, Spearman cross-examined Sheehan concerning the existence of an industry standard for performing tests on wet surfaces. During this earlier exchange, Spearman’s attorney stated, “Well, we’ve got a conflict of opinion here between you and Dr. Templer as to what the standard is, so I’m trying to sort this out as the difference between your opinion and his.” In response to that statement, Sheehan replied, “I have a paper written by Dr. Templer that states what I’m stating with regards to testing on dry walkway surfaces.” Spearman did not object to this reply. Only after Spearman’s attorney made the comment during cross-examination concerning the difference in opinions of Templer and Sheehan did GBA’s counsel follow up on redirect with questions concerning Templer’s publication.
We find no reversible error because the complained of testimony was induced by Spearman, and one may not “complain of a judgment, order, or ruling that his own procedure or conduct aided in causing.” (Citations and punctuation omitted.)
Shilliday v. Dunaway,
supra,
Judgment affirmed.
Notes
Counsel retorted, “Dr. Templer certainly wasn’t asked about that the other day, was he?” Following Sheehan’s reply that he did not know what Templer was asked in court, Spearman’s counsel moved to another line of questioning.
