Smoke Guard Model 400

The SmokeShield® Elevator can be an award-winning, innovative solution designed to prevent smoke and hot gases from entering elevator shafts. This hoistway closure may be the result of almost a century of experience developing products that are specifically designed for fire protection and safety. The SmokeShield® Elevator is ideal for virtually any elevator opening, and you can customize it to check your building.
The engine had to be inspected and repaired after 100 hours, which significantly extended its service life, but there was not enough time for such work, and among crews, it had been believed that there was little benefit in the procedure. The engine left much to be desired, as evidenced by attempts at modifications in the Eighth Army, which didn’t affect the reliability of the tank.
When designing a vehicle exhaust system the required CFM is based on the number of engine sizes in cubic inches and not horsepower. For complete information and free design services contact Air Control Products and we will provide this service at no charge. Vertical Acting Fire Door Systems These vertical acting fire door systems are smoke and fire rated and available with or without egress. Our emphasis on special purpose fire door systems has provided architects and design professionals with numerous options and product performance not previously available, and that are only available from McKEON. Discover what building codes and listings our products meet and gather the necessary documentation for your project.

• The Smoke Guard M4000 pleated curtain can cover openings around 15 feet drop and 200 feet in length.
• The M4A3W HVSS Shermans and other late models with wider-tracked suspensions corrected these problems but formed just a small proportion of the tanks operating even in 1945.
• A February 1943 report described a unit where there have been no broken bogey coil springs even with a 1,000-mile march.
• Smoke Guard M2500 System – This Large Opening Smoke/Fire Fence is custom made to provide protection on openings ≤ 60′ wide by ≤ 12′ tall; ≤ 50′ wide x ≤ 16′ tall; ≤ 40′ wide x ≤ 20′ tall.
• This vertically deploying fire and smoke rated curtain is an economical choice for openings.

Stinger offers two engine options, each paired with a uniquely optimized version of Kia’s 8-speed automatic transmission for fast, seamless shifting and decisive acceleration. The available V6 engine also includes a new electronic variable exhaust valve for a satisfyingly sweet engine note. The M4A1 tank also required an average of 36 hours of transmission maintenance, 93 hours of chassis maintenance, and a little over 20 hours of other maintenance. Work to improve the reliability of the R975 engine led to quite significant changes, resulting in the R975-C4.
Before September 1942, President Franklin D. Roosevelt had announced a production program calling for 120,000 tanks for the Allied war effort. Steel used in naval construction amounted to the equivalent of approximately 67,000 tanks; and therefore, only about 53,500 tanks were produced during 1942 and 1943.
This cost-effective SG Draft fire and smoke curtain is used for static applications such as for example warehouses, aircraft hangers, and manufacturing environments.

The Army also failed to anticipate that the Germans would try to make the Panther the standard tank of these panzer divisions in 1944, supported by small amounts of Tiger I and IIs. In early 1942, tests began on the feasibility of mounting a 105 mm howitzer into the turret of the Sherman. The basic 105 mm howitzer M2A1 was found to be ill-designed for mounting in a tank turret, so it was completely redesigned and re-designated the 105 mm howitzer M4. After modifications to the turret and interior of the hull , the Ordnance Department expressed its approval of the project, and production of M4 tanks armed with 105 mm howitzers began in February 1944. As the Sherman had been designed, provisions were made in order that multiple types of main armament (specified as a 75 mm gun, a 3-inch gun, or a 105 mm howitzer) could be mounted in the turret. Development on a new 76 mm gun better-suited to the Sherman began in fall 1942.

The turret rear armor was 50.8 mm (2.00 in) thick and vertical, as the turret roof armor was 25.4 mm (1.00 in) thick, and flat. General Lesley J. McNair was head of the Army Ground Forces from 1942 to 1944. McNair, a former artilleryman, advocated for the role of the tank destroyer within the U.S. In McNair’s opinion, tanks were to exploit breakthroughs and support infantry, while masses of attacking hostile tanks were to be engaged by tank destroyer units, which were composed of a variety of self-propelled and towed anti-tank guns.
Smoke Guard offers flexible containment solutions for building code smoke protection requirements at the elevator opening and surrounding areas, including approved alternatives to NYC’s zero clearance door requirement. At first, a partial remedy to ammunition fires in the M4 was within 1943 by welding 1-inch thick appliqué armor plates to the sponson sides on the ammunition stowage bins, though there is doubt these had any effect. Later models moved ammunition stowage to the hull floor, with water jackets surrounding each storage bin. The practice, referred to as “wet stowage”, reduced the opportunity of fire after a hit to about 15 percent. Fuel fires occasionally occurred, but such fires were far less common and less deadly than ammunition fires.
M4A4 tanks took second invest reliability following the M4A3 with a Ford GAA engine , before diesel M4A2 and M4A1 radial . And angled at 56 degrees from the vertical, providing an effective thickness of 90.8 mm (3.57 in). The M4, M4A1, early production M4A2, and early production M4A3 possessed protruding cast “hatchway” structures that allowed the driver and assistant driver’s hatches to fit in front of
The hull floor ranged from 25.4 mm (1.00 in) thick beneath the driver and assistant driver’s positions to 12.7 mm (0.50 in) thick at the rear. The M4 had a hatch on the hull bottom to dispose of spent shell casings also to provide an emergency escape route. In the Pacific, Marines often used this Sherman feature backwards to recover wounded infantry under fire. The 75 mm gun had a white phosphorus shell originally designed for use being an artillery marker to greatly help with targeting. This, and the fear of fire starting or spreading inside the tank, would sometimes cause the crew to abandon the tank. There were several recorded instances where white phosphorus shells defeated German tanks in this fashion.