898 P.2d 271
Utah Ct. App.
1995

OPINION

JACKSON, Judge:

Rаndall Pugmire challenges his conviction for possession of a dangerous weapon by a restricted person under sectiоn 76-10-503(2) of the Utah Code.1 We affirm.

BACKGROUND

On February 8,1994, Pugmire appeared at his ex-wife’s home in Provo, Utah. Because she had a protective order against him, she called the police. Meanwhile, Pugmire scuffled with her boyfriend inside her home. When the police arrived, they аrrested Pug-mire for a variety of violations and searched him. During the search, police found a knife in Pugmire’s pocket, confisсated it, and charged him with possession of a dangerous weapon by a restricted person under section 76-10-503(2) of the Utah Codе.

After a bench trial, Pugmire was convicted of the dangerous weapon charge. He appeals that conviction, arguing that section 76-10-503(2), as defined by section 76-10-501(2) of the Utah Code,2 is unconstitutionally vague as applied to the facts of this case;3 and there was insufficient evidence to support his conviction.

ANALYSIS

I. Statutory Vagueness

Pugmire argues that the statutory definition of “dangerous weapon” from section 76-10-501(2), as incorporated by section 76-10-503(2), did not sufficiently specify the behavior from which he was forbidden, ‍‌‌​‌‌‌​​​​​​‌​‌‌​‌​​‌‌‌‌‌​​‌​‌​​​​​‌‌​‌‌‌​‌‌​​‌‌‍as required by constitutional due process. Specifically, he asserts he could not have known that the “oversized pocket knife” or “buck knife” he was carrying was a dangerous weapon within the statute.

Although Pugmire raises the issue on appeal, he did not challenge the constitutionality of this statutory scheme before the trial court.4 As a general rule, we will not consider issues — including constitutional issues — initially rаised on appeal. State v. Ar*273chambean, 820 P.2d 920, 922 (Utah App. 1991). However, if an appellant demonstrates “(1) the trial court committed ‘plain error’; or (2) there are ‘exceptional circumstances,’ ” we will address newly raised constitutional issues. Id. Here, Pugmire did not even argue — lеt alone demonstrate— plain error or exceptional circumstances; accordingly, the constitutional issue is not рroperly before this court and we will not consider it further. See City of Orem v. Lee, 846 P.2d 450, 452 (Utah App.), cert. denied, 857 P.2d 948 (Utah 1993).

II. Sufficiency of Evidence

Pugmire argues the evidence was insufficient to support the trial court’s finding that the knife he carried was a dangerous weapon. The knife itself was the only evidence presented at trial on this issue.

Although wе are dissatisfied with the ‍‌‌​‌‌‌​​​​​​‌​‌‌​‌​​‌‌‌‌‌​​‌​‌​​​​​‌‌​‌‌‌​‌‌​​‌‌‍controlling analysis found in State v. Archam-beau, 820 P.2d 920, 928-30 (Utah App.1991), we are constrained to follow it. See State v. Thurman, 846 P.2d 1256, 1269 (Utah 1993) (holding stare decisis applies when one court of appeals panel is faced with previous decision of different panel).

In Archambeau, the only evidence the trial court had on which to base its finding that two 10-inch knives including 5- to 6-inch blades were dangerous weapons was to view them personally. Archambeau, 820 P.2d at 929. There, this court first interpreted the statutory schеme at issue to require an initial determination of whether a certain weapon or object was “commonly known” as a dаngerous weapon or “not commonly known” as a dangerous weapon. Id. Then, the court summarily determined that “defendant’s two 10-inсh knives with 5-6-inch blades ... are commonly known as dangerous weapons.” Id. The court explained, “[Defendant's knives ... are objectivеly the type of instruments reasonable people would assume were dangerous weapons, as they were objectivеly the type of weapons which are capable of causing death or serious bodily injury.” Id. at 929-30. Based on this analysis, the court concluded “there was ample evidence” to support the ‍‌‌​‌‌‌​​​​​​‌​‌‌​‌​​‌‌‌‌‌​​‌​‌​​​​​‌‌​‌‌‌​‌‌​​‌‌‍trial court’s finding that Areham-beau’s knives were dangerous weapons within-the statute.5 Id. at 930.

Here, the trial court personally viewed Pugmire’s knife, which was about *274nine and one-half inches long including a four and оne-half inch blade. The size of the knife is not significantly different from those knives deemed dangerous weapons in Ar-chambeau. Hence, we must determine under Archambeau that Pugmire’s knife is “commonly known” as a dangerous weapon and that it is objectively the kind of instrument reasonable people would assume to be а dangerous weapon. See id. at 929. Based on this “ample evidence,” id. at 930, we must affirm the trial court’s finding that Pugmire’s knife was a dangerous weapon within the statute.

CONCLUSION

We will not consider Pugmire’s argument raised for the first time on appeal that the statutory scheme at issue is unconstitutionally vague as applied. We conclude under State v. Archambeau, 820 P.2d 920, 929-30 (Utah App.1991), that there was sufficient evidence to support the trial court’s ‍‌‌​‌‌‌​​​​​​‌​‌‌​‌​​‌‌‌‌‌​​‌​‌​​​​​‌‌​‌‌‌​‌‌​​‌‌‍finding that Pugmire’s knife was a dangerous weapon. Accordingly, we affirm.

DAVIS, Associate P.J., concurs.

BENCH, J., concurs in result.

. Section 76-10-503(2) reads in part: "(a) Any person who is on parole or probation for a felony may not have in his possession or under his custody or control any dangerous weapon as defined in this part, (b) Any person who violates this subsection is guilty of a third degree felony. ..." Utah Code Ann. § 76-10-503(2) (1995).

. Section 76-10-501(2)(a) reads:

"Dangerous weapon" means any item that in the manner of its use or intended use is cаpable of causing death or serious bodily injury. The following factors shall be used in determining whether an item, object, or thing not commоnly known as a dangerous weapon is a dangerous weapon:
(i) the character of the instrument, object, or thing;
(ii) the character of the wound produced, if any; and
(iii) the manner in which the instrument, object, or thing was used.

Utah Code Ann. § 76-10-50l(2)(a) (Supp.1988) (currently codified at § 76-10-501(2)(c) (1995)).

. Pugmire does not challenge the facial constitutionality of the statutory scheme at issue. In State v. Archambeau, 820 P.2d 920 (Utah Aрp. 1991), this court held the statutory scheme to be valid, both facially and ‍‌‌​‌‌‌​​​​​​‌​‌‌​‌​​‌‌‌‌‌​​‌​‌​​​​​‌‌​‌‌‌​‌‌​​‌‌‍as applied, against a claim the statutory language wаs unconstitutionally vague. Id. at 928-29.

. In his brief under “Issues Presented for Review,” Pugmire asserts "[tjhe issue of vagueness was preserved at the trial court sеt forth in the Defendant's trial memorandum.” However, nowhere in his memorandum does Pugmire argue the involved statutes are unconstitutionally vague. Instead, his argument focuses on "whether an oversized knife is within the intent of the statute." He examines cases from other states intеrpreting similar statutes and finding knives of various sizes are not within those statutes. Then, he analyzes the language of the Utah statute and the wаy in which it has been interpreted in some cases involving firearms to show the statute does not intend to include “oversized knives."

*273At oral argument, Pugmire’s counsel conceded this issue was not explicitly discussed in the trial memorandum or in the trial court's findings of fact and conclusions of law, but asserted the issue was "implicitly” raised and considered. Generally, an issue must be expressly preserved below to warrant appellate consideration. State v. Brown, 856 P.2d 358, 360 (Utah App.1993) (stating "to ensure trial court’s оpportunity to consider an issue, appellate review of criminal cases in Utah requires 'that a contemporanеous objection or some form of specific preservation of claims of error must be made a part of the trial court record' ” (quoting State v. Tillman, 750 P.2d 546, 551 (Utah 1987))). Thus, counsel’s argument is without merit.