access references POWERED DAVIT CARRIAGES (supplied & installed by others) Primary & secondary suspension lines connect to powered platfrom

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1 POWERED DAVIT CARRIAGES ref.: M 4765 date: 10/98 D2C-type Powered Davit Carriages Los Angeles Convention Center 1201 South Figueroa Street Los Angeles, CA - ref.: 9636 George Hyman Construction Company 4 - D2C-type Powered Davit Carriages Maximum suspension height : South Lobby Tower units (40 m) West Lobby Tower units (28 m) Load capacity: 500 lbs (225 kg) Lifting speed: 20 ft./min. (6m/min.) Traversing system: AC powered drive motor Operators required: 2 per unit Track type: dual WF steel (supplied & installed by others) Primary & secondary suspension lines connect to powered platfrom During the L.A.. Convention Center s expansion from 1993 to 1994, Tractel supplied a variety of access solutions for this nearly completely glazed complex. Rotating booms for platform launching Access to the entire exterior of two towers was required. Powered Davit Carriages were supplied for the upper & lower levels of both the South and West Lobby Tower. The four D2C units support two TRACMOD powered platforms used to service each tower. Line of WF track D2C-type Powered Davit Carriage Powered traversing Other systems supplied on the L.A. Convention Center: TRACMOD Powered Platforms, TRACMOD single user platform, Davits & Bases, Safety tieback anchors, Rolling ladder (powered vertically), Rolling Ladder (rolling beam), Monorail (interior), Transfer trolleys, Intermittent tie-ins.

2 . DAVIT CARRIAGES ref.: M 4768 date: 03/99 D2C Model Davit Carriages Standard D2C ref. A below A A Dual Pipe Track Standard D2C ref. B below B Davit Arm Rigging platform Access Ladder B N Ronald Reagan State Office Building, 300 South Spring Street, Los Angeles, CA ref.: 9956 The Clark Construction Group, Inc. 4 - D2C Davit Carriages 16-6 (5.0m) ht. 4 - Special D2C Davit Carriages 19-3 (9.1m) ht. Associated 600 ft. (185m) dual pipe track 8 26 ft. (8m) lg. TRACMOD powered platforms The Ronald Reagan State Office Building, located in downtown L.A., is owned by the Los Angeles State Building Authority and designed by Architect Richard Faulkner. This application required taller davit masts to overcome very high parapets at the roof level. Both the standard D2C Davit Carriages and the special D2C units allow the Davit Arms to be lowered out-of-view. Maximum suspension height : 205 (62 m) Load capacity: 1150 lbs (525 kg) Lifting speed: 20 ft./min. (6m/min.) Traversing system: AC powered drive motor Operators required: 2 per unit Boom reach: 8 6 (2.59 m) all units Weight (per D2C): std. unit A : 3550 lb (1600 kg) special unit B : 4500 lb (2050 kg) Track type: 6 diameter aluminum dual pipe track A TRACMOD modular powered platform B A B Ronald Reagan State Office Building: Schematic Roof Plan showing Davit Carriages and Track D2C Davit Carriage Tractel provided many different access systems for this project, including davit bases, TRACMOD modular powered platforms, rolling gantries and tieback anchors, as well as the davit carriages described here.

3 ref.: M date: 01/01 page: 1/3 San Francisco Int l Airport, Area A. San Jose, CA ref Hensel Phelps Construction Co (1350 m) dual-pipe track The access systems for the expansion of the San Francisco International Airport were carried out under three different contracts with two different General Contractors. Powered Davit Carriages were used throughout the airport, with different types of track to suit these Building Maintenance Units (BMU). Track type: Track size: Galvanized steel tube, Dual-pipe 8 (400 mm) nominal diameter Gauge: 4 3-3/8 (1.305 m) Track support height.: 4-10 (1,475 m) nominal Track support spacing.: 13-0 (3,960 m) typical The Project Architect for area A was Gerson Overstreet, who elected to use dual-pipe track for this area. Tractel provided many different access systems for this project, including permanent davit bases with portable davit arms, TRACMOD modular powered platforms, tieback anchors and TRAVSAFE horizontal lifelines as well as the D2C powered rolling davit carriages for use with the BMU track described here.. Track Support Boarding Area G: International building Boarding Area A San Francisco International Airport

4 Powered Davit System/ ref: M4769 date: 01/01 page: 2/3 2 D2C type Powered Davits and San Francisco Int l Airport, Boarding Area G. San Jose, CA ref Tutor-Saliba Corporation 2 D2C-type Powered Davit Carriages 1 Power Stage 1 Single-man Power Stage 5020 (1530 m) Dual-pipe Track D2C window washing units c/w - four wheel assemblies per cart - one davit arm per cart 31-7 Sectional Power Stage c/w - two power ends with Tirak hoists - three 6-6 length center sections - one 3-6 length center sections - one 1-11 length center sections 3-6 Dual-line Single-man Power Stage c/w - Tirak hoists with primary and secondary suspension Track type: Galvanized steel tube, Dual-pipe Track size: 8 (400 mm) nominal diameter Gauge: 4 3-3/8 (1.305 m) Track support height.: 3 to 3-6 (.92 to 1.1m) Track support spacing.: 13-0 (3,960 m) typical Description of To provide access to the new Terminal G building Tutor-Saliba Corporation decided to use 2 D2C on 2 parallel tracks running the length of the building. With the two permanent davit bases providing access at the end of the building.

5 Powered Davit System/Davits ref: M4769 date: 01/01 page: 3/3 4 D1C type Powered Davit and San Francisco Int l Airport, International Terminal San Jose, CA ref Tutor-Saliba Corporation & Perini Corporation and Buckley & Company Inc. - a joint venture 4 D1C-type Davit Carriage Assemblies 1 Power Stage 1 Single-man Power Stage D1C window washing units - two with 9-6 reach - two with 6-6 reach c/w - 4 electrical power drives - 4 dual-line suspension trolleys 23-8 Sectional Power Stage 125 service heightc/w - two 3-0 power ends with Tirak hoists with dual suspension (4-line stage) - one 9-10 length center sections - one 3-6 length center sections - two 1-11 length center sections - two 2 3/4 removable ends (for the single man cage) 3-6 Dual-line Single-man Power Stage c/w - Tirak hoists with primary and secondary suspension International Building 3rd. floor Description of To provide access to the new International Terminal at the San Francisco International Airport, Tratcel provided four D1C and a 23-8 powered platform to provide coverage to the easily accessible areas. While extra heavy duty and heavy duty Davit Bases and Davit Arms were required for areas of the building where the D1C could not gain access. This project also called for 3050 (1066m) of travsafe, 98 Davit bases, 14 Davit Arms, Drop Through Sleeves, 20 (6M) Aluminum Section Ladder and 3 Genie Lifts. International Building 6th. floor International Building 6th. floor

6 POWERED DAVIT CARRIAGES ref.: M 4777 date: 06/99 D2C-type Powered Davit Carriage 345 Park Avenue, New York, New York ref 9994 R & R Scaffolding Ltd. 1 - D2C-type Powered Davit Carriage (9m) TRACMOD Powered Platform Data: Suspension height : 150 ft. (m) Load capacity: 500 lbs (225 kg) Lifting speed: 25 ft./min. (6m/min.) Traversing system: 208v, 3 ph, AC motor Operators required: 2 Track type: dual WF steel This D2C -type davit carriage system, located on the sixth floor setback, was supplied to replace an existing unit that was no longer operational. Swingstage Division had previously supplied a D2C unit to retrofit an upper unit. All WF track was existing on site.

7 access reference D2C - Davit Carriage Contractor: ref.: M date: 04/04 D2C - Powered Davit Carriage Edith Green Wendal Wyatt Federal Building Portland, OR - ref Skyward Construction 1 -D2C Powered Davit Carriage 1-40 Modular Stage Platform 1160 Wide Flange Track D2C Powered Powered Davit Carriage: consists of a pair of powered traversing davit carriages, each with a davit mast and manually rotating davit boom reaching 7-6. The D2C traverse to the required drop locations via electrical motors operated at the roof level with a pendent control. Davit carriages suspend Tracmod Powered Platforms that typically range from The platform on this building was a special case being 40 with a weight limitation of 500lbs. 40 Modular Powered Platform c/w Dual suspension Tirak Hoists - 2-3M End sections with end panels - 3-2M Center sections - 2 Vertical tie-in guide assemblies Edith Green Wendal Wyatt Federal Building required access to the exterior of the building for window washing and future building maintenance. The D2C solution was because of the quick access it can provide and to reduce the labor intensive operations of moving portable davits from location to location Tractel. All rights reserved.

8 access reference D2C and Powered Platform ref.: M date: 02/09 D2C Whilshire Federal building Wilshire Blvd. Los Angeles, CA - ref West Coast General D2C and Powered Platform 2009Tractel Allrightsreserved.