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Occupational Safety and Health Administration OSHA

Inspection Detail

Case Status: CLOSED

Inspection: 508219.015 - Harrison Hoist, Inc.

Inspection Information - Office: Dallas

 

Inspection Nr: 508219.015
Report ID: 0626300
Open Date: 07/07/2012

Site Address:
Harrison Hoist, Inc.
800 W. Campbell Rd.
Richardson, TX 75080

Mailing Address:
105 Keystone Drive, Telford, PA 18969

Union Status: Union

SIC:

NAICS: 238990/All Other Specialty Trade Contractors


Inspection Type: Fat/Cat

Scope: Complete

Advanced Notice: N

Ownership: Private

Safety/Health: Safety

Close Conference: 09/26/2012

Emphasis: L:Constr6, L:Crane

Close Case:12/19/2012


Related Activity
Type Activity Nr Safety Health
Accident 436730
Inspection 508398 Yes
Inspection 523919 Yes
Case Status: CLOSED
Violation Summary
Violations/Penalties Serious Willful Repeat Other Unclass Total
Initial Violations 6 6
Current Violations 4 4
Initial Penalty $29,400 $0 $0 $0 $0 $29,400
Current Penalty $15,680 $0 $0 $0 $0 $15,680
FTA Penalty $0 $0 $0 $0 $0 $0

Violation Items
# Citation ID Citaton Type Standard Issuance Date Abatement Due Date Current Penalty Initial Penalty FTA Penalty Contest Latest Event Note
1. 01001 Serious 19261404 H12 11/20/2012 11/29/2012 $4,900 $4,900 $0 I - Informal Settlement Citation has been deleted.
2. 01002 Serious 19261406 A01 11/20/2012 11/29/2012 $3,920 $4,900 $0 I - Informal Settlement  
3. 01003 Serious 19261406 A02 11/20/2012 11/29/2012 $3,920 $4,900 $0 I - Informal Settlement  
4. 01004 Serious 19261406 A03 11/20/2012 11/29/2012 $4,900 $4,900 $0 I - Informal Settlement Citation has been deleted.
5. 01005 Serious 19261406 B 11/20/2012 11/29/2012 $3,920 $4,900 $0 I - Informal Settlement  
6. 01006 Serious 19261430 D 11/20/2012 11/29/2012 $3,920 $4,900 $0 I - Informal Settlement  

Investigation Summary

Investigation Nr: 22015.015
Event: 07/07/2012
Two Employees Are Killed When Tower Crane Mast Collapse

At 3:20 p.m. on July 7, 2012, Employees #1 and #2 were standing in the proximit y of the top tower section and awaiting on the Terex Peiner, (Model SK 415) Towe r Crane to hoist the rigging needed to lower the top section to the ground. The mast stood eleven tower sections high or approximately 220 feet high with the t op section connected to a climbing adapter section. Each tower section was appro ximately 196- in length and weighed 9,300 lbs. Each tower section consisted of four corners and each corner consisted of two connecting points. One connecting point was located on the outside of the flange and the second one was located on the inside of the flange. Eight connecting elements (mast bolts) connected two tower sections at their connecting points such that the bottom tower section (to wer section one) was anchored to the foundation by eight mast bolts and the bott om of tower section two was anchored to the top of tower section one by eight ma st bolts. The sequence continued on all tower sections and climbing adapter sect ion. Prior to the accident the jib, counterweights, and turning table/cab assem bly had been removed. Prior to dismantling of the mast the employer removed mast bolts from every other tower section and placed these in their respective carri ers. Some of the remaining bolts were also de-torqued. Five bolts were removed f rom the bottom of tower section two and placed in their respective carriers. Two bolts were removed from the NE corner and two bolts were removed from the SE co rner leaving the east section of the mast at the bottom of tower section two uns upported. Prior to the accident a weather system began to move into the area. Im mediately prior to the accident wind gusts of approximately 36 mph came into con tact with the mast, At 3:20 p.m., wind gusts of approximately 36 mph came into c ontact with the mast causing the mast to hinge west between tower sections one a nd two. As the mast continued to lean west its center of gravity shifting beyond its tipping point causing the upper eleven sections of the mast to fall and col lapse. The top section of tower section three collapsed on a concrete wall. The upper tower sections continued their descending trajectory collapsing on a steel structure anchored to the roof; killing both employees. The adapter unit collap sed on a concrete wall to the west of the steel structure. Both employees sustai ned blunt force injuries and were killed.

Keywords:collapse, crane, crane counterweight, hoist, rigging, structural collapse, tower

Investigated Inspection
# Inspection Age Sex Degree Nature Occupation
1 508219.015 Fatality Millwrights
2 508219.015 Fatality Millwrights
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