## Facts

- Charles R. Rand worked as an asbestos insulation worker for about 26 years and smoked about two packs of cigarettes daily for roughly 30 years.
- In 1960, Rand worked for six to nine months on an insulation job in Tacoma, Washington, using “Pabco Caltemp” asbestos-containing pipe covering manufactured exclusively by Fibreboard.
- A coworker described the work conditions as extremely dusty and unavoidable to breathe.
- Rand was diagnosed with lung adenocarcinoma in January 1978 and died on March 23, 1978, at age 48.
- The estate brought a wrongful death products-liability failure-to-warn action against multiple asbestos product manufacturers and distributors; all but Fibreboard settled.
- Expert medical testimony conflicted on whether smoking alone could explain the cancer or whether asbestos exposure substantially contributed, including evidence that the cancer type was consistent with asbestos-related disease.

## Issues

1. Whether evidence of a six-to-nine-month exposure to Fibreboard’s asbestos product was sufficient for a jury to find proximate causation under the substantial-factor test.
2. Whether the trial court properly refused to reduce damages based on the jury’s finding that Rand was 55% comparatively negligent due to smoking, given limits on comparative negligence tied to the “particular risk” that made the defendant’s conduct negligent.

## Decision

- The Michigan Supreme Court affirmed the judgment for the plaintiff.
- The Court held that the causation evidence permitted a reasonable jury to find Fibreboard’s failure to warn was a substantial factor and proximate cause of Rand’s lung cancer, despite heavy smoking and conflicting expert testimony.
- The Court held the trial court did not err by declining to apply the jury’s 55% comparative-negligence allocation based on smoking.
- The Court concluded that, on this record, smoking did not constitute comparative negligence that legally reduced recovery because it was not shown to fall within the specific asbestos-related risk Fibreboard had a duty to warn against, including the combined asbestos-and-smoking risk.

## Legal Principles

- In multiple-cause personal injury cases, a defendant’s negligence may be a proximate cause if it is a substantial factor in producing the harm; the presence of other contributing causes does not bar liability.
- When reviewing sufficiency of evidence on causation, the question is whether reasonable jurors could differ; if so, causation is for the jury.
- Comparative negligence is limited to plaintiff conduct that exposes the plaintiff to the particular risk that made the defendant’s conduct negligent (Restatement (Second) of Torts § 468 concept).
- A plaintiff’s general awareness of risks from separate conduct (such as smoking) does not necessarily establish fault that reduces recovery for harm tied to a defendant’s failure to warn, absent proof that the plaintiff knew or should have known of the relevant specific risk (including any claimed combined-risk mechanism).

## Conclusion

The court sustained a failure-to-warn verdict by holding that short-term but heavy asbestos exposure supported substantial-factor causation even with a major alternative cause (smoking), and it upheld the refusal to reduce damages where the plaintiff’s smoking was not shown to be fault within the specific risk that triggered the manufacturer’s duty to warn.


Brisboy v. Fibreboard Corp., 429 Mich. 540, 418 N.W.2d 650 (1988)