Accident Report Detail

Accident Summary Nr: 14468128 - RADIO TOWER COLLAPSE

Accident Summary Nr: 14468128 -- Report ID: 0155010 -- Event Date: 04/05/1986
Inspection Nr	Date Opened	SIC	NAICS	Establishment Name
3286606	04/05/1986	1799	0	Prescott Towers Ltd.

Abstract: A 415' RADIO TOWER WAS BEING ERECTED IN A SWAMP. ONE OF THE THREE TIEDOWN ANCHORS, SPACED 120' APART AND 280' FROM THE TOWER BASE, FAILED WHILE EMPLOYEES #1 AND #2 WERE ON THE TOWER AND TIED OFF AT 220' AND 240' ELEVATIONS RESPECTIVELY. BOTH EMPLOYEES, AFTER RIDING THE TOWER DOWN, DIED ON IMPACT OF MULTIPLE BLUNT TRAUMA. TWO 100' HIGH-STRENGTH WIRE STRAND CABLES (.6"7-WIRE), PROTRUDING 6' FROM A MINI-CAISSON (5 1/2" CASING) DRILLED AT 38' FROM THE HORIZONTAL, WERE NOT IN CONTINUOUS LENGTHS. A PROTRUDING 6' TIEDOWN CABLE PULLED OUT OF A "SUPREME" ONE-TIME-USING (OUT) SPLICE CHUCK #S740 LOCATED JUST 6" INSDE OF CASING. BOTH CABLES WERE TESTED AT 125% OF THE DESIGN LOAD SIMULTANEOUSLY RATHER THAN INDEPENDENTLY. TOWER ERECTION AND ANCHOR INSTALLATION PERFORMED BY SEPARATE CONTRACTORS.

Keywords: ERECTION PROCESS, COLLAPSE, CONSTRUCTION, STEEL ERECTION, FALL, TOWER

Employee Details
Employee #	Inspection Nr	Age	Sex	Degree of Injury	Nature of Injury	Occupation
1	3286606			Fatality	Other	Construction trades, n.e.c.
2	3286606			Fatality	Other	Construction trades, n.e.c.

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